Net sales and costs
Net sales
| 
                                        2018 
                                     | 
                                    
                                        2017 
                                     | 
                                 |
| 
                                        Goods sold 
                                     | 
                                    
                                        9,091 
                                     | 
                                    
                                        8,451 
                                     | 
                                 
| 
                                        Services rendered 
                                     | 
                                    
                                        164 
                                     | 
                                    
                                        173 
                                     | 
                                 
| 
                                        Royalties  
                                     | 
                                    
                                        12 
                                     | 
                                    
                                        8 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        9,267 
                                     | 
                                    
                                        8,632 
                                     | 
                                 
Fulfillment of the performance obligations of goods is measured using the commercial shipment terms as an indicator for the transfer of control. Fulfillment of the performance obligations for services rendered is identified according to the individual contract. The payment terms are determined per business segment on a customer basis. DSM has neither specific obligations for returns or refunds, nor specific warranties or other related obligations.
Disaggregation of net sales
| 
                                        
                                          2018
                                        
                                     | 
                                    
                                        2017 
                                     | 
                                 |
| 
                                        Nutrition 
                                     | 
                                    ||
|---|---|---|
| 
                                        DSM Nutritional Products: 
                                     | 
                                    ||
| 
                                        - Animal Nutrition & Health 
                                     | 
                                    
                                        3,134 
                                     | 
                                    
                                        2,660 
                                     | 
                                 
| 
                                        - Human Nutrition & Health 
                                     | 
                                    
                                        2,019 
                                     | 
                                    
                                        1,939 
                                     | 
                                 
| 
                                        - Personal Care & Aroma Ingredients 
                                     | 
                                    
                                        382 
                                     | 
                                    
                                        353 
                                     | 
                                 
| 
                                        - Other 
                                     | 
                                    
                                        112 
                                     | 
                                    
                                        86 
                                     | 
                                 
| 
                                        5,647 
                                     | 
                                    
                                        5,038 
                                     | 
                                 |
| 
                                        DSM Food Specialties 
                                     | 
                                    
                                        490 
                                     | 
                                    
                                        541 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        6,137 
                                     | 
                                    
                                        5,579 
                                     | 
                                 
| 
                                        Materials 
                                     | 
                                    ||
| 
                                        DSM Engineering Plastics 
                                     | 
                                    
                                        1,516 
                                     | 
                                    
                                        1,448 
                                     | 
                                 
| 
                                        DSM Dyneema 
                                     | 
                                    
                                        344 
                                     | 
                                    
                                        332 
                                     | 
                                 
| 
                                        DSM Resins & Functional Materials 
                                     | 
                                    
                                        1,053 
                                     | 
                                    
                                        1,045 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        2,913 
                                     | 
                                    
                                        2,825 
                                     | 
                                 
| 
                                        Innovation Center 
                                     | 
                                    
                                        172 
                                     | 
                                    
                                        169 
                                     | 
                                 
| 
                                        Corporate Activities 
                                     | 
                                    
                                        45 
                                     | 
                                    
                                        59 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        9,267 
                                     | 
                                    
                                        8,632 
                                     | 
                                 
Total costs
                           
In 2018, total operating costs amounted to €8.0 billion, €0.2 billion higher than in 2017, when these costs stood at €7.8 billion. Total operating costs in 2018 included Cost of sales amounting to €5.9 billion (2017: €5.7 billion); gross margin as a percentage of net sales stood at 37% (2017: 34%). 
Employee benefit costs
| 
                                        2018 
                                     | 
                                    
                                        2017 
                                     | 
                                 |
| 
                                        Wages and salaries 
                                     | 
                                    
                                        1,433 
                                     | 
                                    
                                        1,452 
                                     | 
                                 
| 
                                        Social security costs 
                                     | 
                                    
                                        185 
                                     | 
                                    
                                        181 
                                     | 
                                 
| 
                                        Pension costs (see also Note 24) 
                                     | 
                                    
                                        110 
                                     | 
                                    
                                        112 
                                     | 
                                 
| 
                                        Share-based compensation (see also Note 27) 
                                     | 
                                    
                                        25 
                                     | 
                                    
                                        23 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        1,753 
                                     | 
                                    
                                        1,768 
                                     | 
                                 
Depreciation, amortization and impairments
| 
                                        2018 
                                     | 
                                    
                                        2017 
                                     | 
                                 |
| 
                                        Amortization of intangible assets 
                                     | 
                                    
                                        149 
                                     | 
                                    
                                        146 
                                     | 
                                 
| 
                                        Depreciation of property, plant and equipment 
                                     | 
                                    
                                        320 
                                     | 
                                    
                                        318 
                                     | 
                                 
| 
                                        Impairment losses 
                                     | 
                                    
                                        40 
                                     | 
                                    
                                        38 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        509 
                                     | 
                                    
                                        502 
                                     | 
                                 
Other operating income
| 
                                        2018 
                                     | 
                                    
                                        2017 
                                     | 
                                 |
| 
                                        Release of provisions 
                                     | 
                                    
                                        8 
                                     | 
                                    
                                        6 
                                     | 
                                 
| 
                                        Gain on sale of assets and activities 
                                     | 
                                    
                                        25 
                                     | 
                                    
                                        20 
                                     | 
                                 
| 
                                        Insurance benefits 
                                     | 
                                    
                                        18 
                                     | 
                                    
                                        4 
                                     | 
                                 
| 
                                        Amendments/settlements pension plans 
                                     | 
                                    
                                        11 
                                     | 
                                    
                                        20 
                                     | 
                                 
| 
                                        Earn-out payments and other settlements 
                                     | 
                                    
                                        10 
                                     | 
                                    
                                        28 
                                     | 
                                 
| 
                                        Sundry 
                                     | 
                                    
                                        32 
                                     | 
                                    
                                        26 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        104 
                                     | 
                                    
                                        104 
                                     | 
                                 
Other operating expense
| 
                                        2018 
                                     | 
                                    
                                        2017 
                                     | 
                                 |
| 
                                        Additions to provisions 
                                     | 
                                    
                                        36 
                                     | 
                                    
                                        87 
                                     | 
                                 
| 
                                        Exchange differences 
                                     | 
                                    
                                        7 
                                     | 
                                    
                                        8 
                                     | 
                                 
| 
                                        Acquisitions/Disposals 
                                     | 
                                    
                                        7 
                                     | 
                                    
                                        3 
                                     | 
                                 
| 
                                        Earn-out Amyris Brasil 
                                     | 
                                    
                                        11 
                                     | 
                                    
                                        - 
                                     | 
                                 
| 
                                        Sundry 
                                     | 
                                    
                                        22 
                                     | 
                                    
                                        14 
                                     | 
                                 
| 
                                        Total 
                                     | 
                                    
                                        83 
                                     | 
                                    
                                        112 
                                     |