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Derivative Instruments and Hedging Activities - Part 3 (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Cash Flow Hedging [Member] |  |
Derivative Instruments Gain Loss [Line Items] |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | $ (12) | $ (9)
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | (86) | 72
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 | 0 | (4)
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 | (11) | 1
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | 3 | 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 | 7 | 10
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | 5 | 19
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 | 57 |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | (8) | (16)
Gain Loss By Type Of Derivative Tables |  |
Gain (Losses) Recognized in AOCL | (94) | 47
Not Designated as Hedging Instrument [Member] |  |
Gain Loss By Type Of Derivative Tables |  |
Gains (Losses) Recognized in Earnings (not designated as hedging instruments) | (5) | 117
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) | 2 | 9
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) | (5) | 108
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) | $ (2) | $ 0

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