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Other assets and liabilities (Details) - EUR (€) € in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Other assets and liabilities |  |
Fair value of derivative financial instruments, current assets | € 2,573 | € 1,594
Other taxes, current assets | 766 | 561
Other assets, current | 633 | 664
Other current assets, total | 3,972 | 2,819
Fair value of derivative financial instruments, non-current assets | 54 | 68
Other taxes, non-current assets | 223 | 254
Other assets, non-current | 594 | 302
Other non-current assets, total | 871 | 624
Fair value of derivatives financial instruments, current liabilities | 2,704 | 1,445
Contract liabilities, current | 1,669 | 1,108
Other taxes, current liabilities | 1,411 | 1,432
Other liabilities, current | 1,362 | 1,427
Other current liabilities, total | 7,146 | 5,412
Fair value of derivatives financial instruments, non-current liabilities | 50 | 40
Contract liabilities, non-current | 456 | 518
Other taxes, non-current liabilities | 63 | 34
Other liabilities, non-current | 1,042 | 883
Other non-current liabilities, total | € 1,611 | € 1,475

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