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Long-term Employee Benefits (Schedule of Net Periodic Pension Income and Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Changes in plan assets and benefit obligations recognized in other comprehensive income:    
Amortization of actuarial loss, pre-tax $ 4 $ 5
Benefit recognized in other comprehensive income (5) (5)
Pension Plan [Member] | Foreign [Member]    
Net periodic pension (cost) income:    
Service cost (4) (4)
Interest cost (4) (4)
Expected return on plan assets 15 17
Amortization of actuarial loss (4) (5)
Net periodic benefit cost 3 4
Changes in plan assets and benefit obligations recognized in other comprehensive income:    
Amortization of actuarial loss, pre-tax 4 5
Benefit recognized in other comprehensive income 4 5
Total net periodic pension income and benefit recognized in comprehensive income $ 7 $ 9