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Derivative Instruments and Hedging Activities - Part 3 (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Cash Flow Hedging [Member] |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | $ (103) | $ (10) | $ (143) | $ (22)
Gain Loss By Type Of Derivative Tables |  |  |  |
Gain (Losses) Recognized in AOCL | (132) | (164) | (713) | (250)
Cash Flow Hedging [Member] | Equity Method Investments [Member] |  |  |  |
Gain Loss By Type Of Derivative Tables |  |  |  |
Gain (Losses) Recognized in AOCL |  |  | (43) | 0
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 | 2 | 0
Gain Loss By Type Of Derivative Tables |  |  |  |
Gain (Losses) Recognized in AOCL | 4 | (1) | 4 | (1)
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 | (5) | 0 | (13) | (11)
Gain Loss By Type Of Derivative Tables |  |  |  |
Gain (Losses) Recognized in AOCL | (2) | 3 | (14) | 6
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 | 2 | (1) | (15) | 6
Gain Loss By Type Of Derivative Tables |  |  |  |
Gain (Losses) Recognized in AOCL | 3 | 4 | (36) | 9
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 | (121) |  | (121) |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (102) | (9) | (117) | (17)
Gain Loss By Type Of Derivative Tables |  |  |  |
Gain (Losses) Recognized in AOCL | (137) | (170) | (624) | (264)
Loss on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring | 0 | (2) | 0 | (2)
Not Designated as Hedging Instrument [Member] |  |  |  |
Gain Loss By Type Of Derivative Tables |  |  |  |
Gains (Losses) Recognized in Earnings (not designated as hedging instruments) | (18) | 11 | 28 | 6
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) | 0 | 2 | 6 | 4
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) | (18) | 11 | 22 | 6
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) | $ 0 | $ (2) | $ 0 | $ (4)

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