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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statements of Comprehensive Income [Abstract]      
Net income $ 24 $ 481 $ 1,235
Components of other comprehensive income that will be reclassified subsequently to net income (loss)      
Currency translation differences 118 (20) (95)
Net change in fair value of cash flow hedges transferred to the statement of income (54) (38) 0
Effective portion of the change in fair value of cash flow hedges 53 42 0
Tax relating to items that will be reclassified subsequently to net income 0 (1) 0
Total 117 (17) (95)
Components of other comprehensive income that will not be reclassified to net income (loss)      
Net changes of investments at fair value through other comprehensive income 18 10 (58)
Gains (losses) from defined benefit plans (15) (75) 56
Tax relating to items that will not be reclassified to net income (6) 10 (3)
Total (3) (55) (5)
Total comprehensive income 138 409 1,135
Comprehensive income (loss) attributable to the non-controlling interests 23 4 (9)
Comprehensive income attributable to the shareholders of the Company $ 115 $ 405 $ 1,144