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Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Effective Portion of Cash Flow Hedges) (Details) - Cash Flow Hedging - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | $ (492) |  | $ (91) | $ (54) |
Gain (Loss) on Derivative Instruments, Net, Pretax | 106 |  | (1) | (52) |
Interest Rate Contract |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | (419) |  | (75) | (28) |
AOCI before tax expected increase (decrease) next 12 months | 100 |  |  |  |
Loss on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring | 0 | [1] | 0 | (2) | [1]
Cross Currency Interest Rate Contract [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | (15) |  | (5) | (12) |
Foreign Exchange Contract [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | (62) |  | (9) | (13) |
Gain (Loss) on Derivative Instruments, Net, Pretax | 29 |  | 68 | (46) |
Commodity Contract [Member] |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion | 4 |  | (2) | (1) |
Gain (Loss) on Derivative Instruments, Net, Pretax | $ (28) |  | $ (68) | $ (6) |
[1] | Cash flow hedge was discontinued on a cross-currency swap in 2019 because the underlying debt was prepaid.

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- Definition The pre-tax accumulated other comprehensive income (loss) expected to be recognized as an increase (decrease) to income from continuing operations before income taxes over the next twelve months as of the balance sheet date. + References No definition available. + Details
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