Financial Instruments, Derivatives and Hedging Activities - Balance Sheet Location (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019 |
Designated as Hedging Instrument | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | $ 6 | $ 17 |
Fair value of derivative instruments, Liabilities | 30 | 25 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (24) | (8) |
Designated as Hedging Instrument | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 3 | 12 |
Designated as Hedging Instrument | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 3 | 5 |
Designated as Hedging Instrument | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 28 | 17 |
Designated as Hedging Instrument | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 2 | 8 |
Designated as Hedging Instrument | Commodity Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 5 | 6 |
Fair value of derivative instruments, Liabilities | 28 | 17 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (23) | (11) |
Designated as Hedging Instrument | Commodity Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 3 | 5 |
Designated as Hedging Instrument | Commodity Contracts | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 2 | 1 |
Designated as Hedging Instrument | Commodity Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 26 | 13 |
Designated as Hedging Instrument | Commodity Contracts | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 2 | 4 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | 10 |
Fair value of derivative instruments, Liabilities | 2 | 8 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (1) | 2 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | | 7 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 1 | 3 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 2 | 4 |
Designated as Hedging Instrument | Foreign Currency Forward Contracts | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | | 4 |
Designated as Hedging Instrument | Interest Rate Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | | 1 |
Fair value of derivative instruments, Net Assets/(Liabilities) | | 1 |
Designated as Hedging Instrument | Interest Rate Contracts | Other assets | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | | 1 |
Not Designated as Hedging Instrument | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 6 | 7 |
Fair value of derivative instruments, Liabilities | 23 | 11 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (17) | (4) |
Not Designated as Hedging Instrument | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 5 | 6 |
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 | 20 | 9 |
Not Designated as Hedging Instrument | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 3 | 2 |
Not Designated as Hedging Instrument | Commodity Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | | 2 |
Fair value of derivative instruments, Liabilities | 4 | 1 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (4) | 1 |
Not Designated as Hedging Instrument | Commodity Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | | 2 |
Not Designated as Hedging Instrument | Commodity Contracts | Accounts payable and accrued liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | 4 | 1 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 6 | 5 |
Fair value of derivative instruments, Liabilities | 19 | 10 |
Fair value of derivative instruments, Net Assets/(Liabilities) | (13) | (5) |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Accounts receivable, net | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Assets | 5 | 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 | 16 | 8 |
Not Designated as Hedging Instrument | Foreign Currency Forward Contracts | Non-current liabilities | | |
Fair value of derivatives | | |
Fair value of derivative instruments, Liabilities | $ 3 | $ 2 |