Financial Instruments (Qualifying Hedging Activity Reported in Accumulated Other Comprehensive Earnings (Losses) Net of Income Taxes) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
Hedging Activity, Affecting Accumulated Other Comprehensive Income [Roll Forward] | ||||
Derivative (gains)/losses transferred to earnings | $ (2) | $ 13 | $ (17) | $ (12) |
Change in fair value | (31) | (14) | (37) | (34) |
Derivative Contract [Member] | Other Comprehensive Income (Loss) [Member] | ||||
Hedging Activity, Affecting Accumulated Other Comprehensive Income [Roll Forward] | ||||
Gain/(loss) at beginning of period, | (18) | (10) | 3 | 35 |
Derivative (gains)/losses transferred to earnings | (2) | 13 | (17) | (12) |
Change in fair value | (31) | (14) | (37) | (34) |
Gain/(loss) as of September 30, | $ (51) | $ (11) | $ (51) | $ (11) |