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Derivative Instruments and Hedging Activities - Part 3 (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Cash Flow Hedging [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | $ (30) | $ (40)
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | 310 | (581)
Cash Flow Hedging [Member] | Commodity Contract [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (2) | 0
Cash Flow Hedging [Member] | Foreign currency derivatives [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (3) | (8)
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | (1) | (12)
Cash Flow Hedging [Member] | Cross currency derivatives [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (1) | (17)
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | 2 | (39)
Cash Flow Hedging [Member] | Interest Rate Contract [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Accumulated Other Comprehensive Income Loss Before Tax Expected Increase Decrease Next Twelve Months | (85) |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (24) | (15)
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | 309 | (530)
Loss on Cash Flow Hedges due to impairment of assets | (4) | 0
Not Designated as Hedging Instrument [Member] |  |
Gain Loss By Type Of Derivative Tables |  |
Gains (Losses) Recognized in Earnings (not designated as hedging instruments) | (44) | 46
Not Designated as Hedging Instrument [Member] | Other Contract [Member] |  |
Gain Loss By Type Of Derivative Tables |  |
Gains (Losses) Recognized in Earnings (not designated as hedging instruments) | (93) | 6
Not Designated as Hedging Instrument [Member] | Foreign currency derivatives [Member] |  |
Gain Loss By Type Of Derivative Tables |  |
Gains (Losses) Recognized in Earnings (not designated as hedging instruments) | (11) | 40
Not Designated as Hedging Instrument [Member] | Interest Rate Contract [Member] |  |
Gain Loss By Type Of Derivative Tables |  |
Gains (Losses) Recognized in Earnings (not designated as hedging instruments) | $ 60 | $ 0

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