Derivative Instruments - Schedule of Effect of Hedge Accounting on Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
Sales swaps | ||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||
Gain (loss) on derivatives in AOCI | $ 6 | $ 0 | $ (6) | $ 0 |
Commodity purchase swaps | ||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||
Gain (loss) on derivatives in AOCI | 0 | 8 | (7) | 5 |
Net sales | Sales swaps | ||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||
Amount of gain (loss) recognized in income | (6) | 0 | (9) | 0 |
Cost of sales | Commodity purchase swaps | ||||
Derivative Instruments, Gain (Loss) [Line Items] | ||||
Amount of gain (loss) recognized in income | $ (4) | $ (2) | $ (3) | $ (5) |