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Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | $ 22,984 | $ 23,071 | $ 22,290
Net change in accumulated other comprehensive income (loss) | (50) | (158) | (140)
Ending Balance | 22,177 | 22,984 | 23,071
Tax impact for the changes in each component of accumulated other comprehensive (loss) income |  |  |
Total tax impact | 90 | (81) | (45)
Accumulated Other Comprehensive Income (Loss) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (2,895) | (2,737) | (2,597)
Ending Balance | (2,945) | (2,895) | (2,737)
Net Unrealized Gains (Losses) on Debt Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 65 | 33 | (8)
Net change in accumulated other comprehensive income (loss) | (42) | 32 | 41
Ending Balance | 23 | 65 | 33
Tax impact for the changes in each component of accumulated other comprehensive (loss) income |  |  |
Total tax impact | (13) | 9 | 12
Foreign Currency Translation Adjustment Gains (Losses) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (2,229) | (2,189) | (2,133)
Net change in accumulated other comprehensive income (loss) | (163) | (40) | (56)
Ending Balance | (2,392) | (2,229) | (2,189)
Net Unrealized Pension and Other Postretirement Benefit Gains (Losses) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (731) | (581) | (456)
Net change in accumulated other comprehensive income (loss) | 155 | (150) | (125)
Ending Balance | (576) | (731) | (581)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income |  |  |
Total tax impact | 52 | (28) | (38)
Net translation on investments in foreign operations |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Net change in accumulated other comprehensive income (loss) | (339) | 213 | 84
Tax impact for the changes in each component of accumulated other comprehensive (loss) income |  |  |
Total tax impact | (1) | 17 | 24
Net hedges of investments in foreign operations |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Net change in accumulated other comprehensive income (loss) | 176 | (253) | (140)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income |  |  |
Total tax impact | $ 52 | $ (79) | $ (43)

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