Long-Term Employee Benefits (Schedules of Net Periodic Benefit Cost) (Details) - Foreign Pension Plan [Member] - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||||
| Service cost | $ 3 | $ 5 | $ 10 | $ 11 |
| Interest cost | 5 | 5 | 15 | 14 |
| Expected return on plan assets | (16) | (21) | (49) | (61) |
| Amortization of actuarial net loss | 9 | 1 | 20 | 8 |
| Amortization of prior service cost (gain) | 0 | 4 | (1) | 6 |
| Curtailment gain | 0 | 0 | (2) | 0 |
| Net periodic benefit cost (income) | $ 1 | $ (6) | $ (7) | $ (22) |