Financial Instruments, Derivatives and Hedging Activities - Balance Sheet Location (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020 |
Designated as Hedging Instrument | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | $ 57 | $ 61 |
Fair value of derivative instruments, Liabilities | 7 | 18 |
Fair value of derivative instruments, Net Assets/(Liabilities) | 50 | 43 |
Designated as Hedging Instrument | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 55 | 57 |
Designated as Hedging Instrument | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 2 | 4 |
Designated as Hedging Instrument | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 6 | 16 |
Designated as Hedging Instrument | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 1 | 2 |
Designated as Hedging Instrument | Commodity Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 55 | 54 |
Fair value of derivative instruments, Liabilities | 3 | 6 |
Fair value of derivative instruments, Net Assets/(Liabilities) | 52 | 48 |
Designated as Hedging Instrument | Commodity Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 54 | 50 |
Designated as Hedging Instrument | Commodity Contracts | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | 4 |
Designated as Hedging Instrument | Commodity Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 2 | 4 |
Designated as Hedging Instrument | Commodity Contracts | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 1 | 2 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 2 | 7 |
Fair value of derivative instruments, Liabilities | 4 | 12 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (2) | (5) |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | 7 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 4 | 12 |
Not Designated as Hedging Instrument | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 11 | 8 |
Fair value of derivative instruments, Liabilities | 12 | 11 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (1) | (3) |
Not Designated as Hedging Instrument | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 10 | 7 |
Not Designated as Hedging Instrument | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | 1 |
Not Designated as Hedging Instrument | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 11 | 9 |
Not Designated as Hedging Instrument | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 1 | 2 |
Not Designated as Hedging Instrument | Commodity Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 3 | 3 |
Fair value of derivative instruments, Liabilities | 1 | 1 |
Fair value of derivative instruments, Net Assets/(Liabilities) | 2 | 2 |
Not Designated as Hedging Instrument | Commodity Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 3 | 3 |
Not Designated as Hedging Instrument | Commodity Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 1 | 1 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 8 | 5 |
Fair value of derivative instruments, Liabilities | 11 | 10 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (3) | (5) |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 7 | 4 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | 1 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 10 | 8 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | $ 1 | $ 2 |