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Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2022 | Jun. 30, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Pre-tax AOCI activity, period start | $ (1,629) | $ 387 | $ 793 | $ 1,759 | $ 387 | $ 1,759
Other Comprehensive Income (Loss), before Tax | (1,143) |  | 78 |  | (3,159) | (888)
Pre-tax AOCI activity, period end | (2,772) | (1,629) | 871 | 793 | (2,772) | 871
AOCI, tax, effect, period start | 415 | (98) | (201) | (444) | (98) | (444)
Unrealized holding gains (losses) on available for sale securities, tax | (237) |  | 23 |  | (618) | (115)
Other Comprehensive Income (Loss), Tax | 290 |  | (19) |  | 803 | 224
AOCI, tax effect, period end | 705 | 415 | (220) | (201) | 705 | (220)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start | (1,214) | 289 | 592 | 1,315 | 289 | 1,315
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax) | (694) |  | 71 |  | (1,811) | (339)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | 0 |  | (1) |  | 0 | (2)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax | (109) |  | 56 |  | (420) | (192)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax | (167) |  | (22) |  | (560) | (346)
Other comprehensive income (loss), net of tax | (853) | (1,503) | 59 | (723) | (2,356) | (664)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End | (2,067) | (1,214) | 651 | 592 | (2,067) | 651
Accumulated Net Unrealized Loss on Held To Maturity Securities [Member] |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Pre-tax AOCI activity, period start | (13) | (14) | (18) | (21) | (14) | (21)
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, before Tax | 1 |  | 1 |  | 2 | 4
Pre-tax AOCI activity, period end | (12) | (13) | (17) | (18) | (12) | (17)
AOCI, tax, effect, period start | 3 | 3 | 4 | 5 | 3 | 5
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, Tax | 0 |  | 0 |  | 0 | (1)
AOCI, tax effect, period end | 3 | 3 | 4 | 4 | 3 | 4
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start | (10) | (11) | (14) | (16) | (11) | (16)
Other Comprehensive Loss, Held-to-maturity Security, Adjustment from AOCI for Accretion of Noncredit Portion of OTTI, after Tax | 1 |  | 1 |  | 2 | 3
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End | (9) | (10) | (13) | (14) | (9) | (13)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member] |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Pre-tax AOCI activity, period start | (1,280) | 218 | 513 | 1,062 | 218 | 1,062
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax | (931) |  | 94 |  | (2,429) | (454)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax |  |  | 1 |  |  | (2)
Other Comprehensive Income (Loss), before Tax |  |  | 93 |  |  | (456)
Pre-tax AOCI activity, period end | (2,211) | (1,280) | 606 | 513 | (2,211) | 606
AOCI, tax, effect, period start | 326 | (55) | (130) | (268) | (55) | (268)
Unrealized holding gains (losses) on available for sale securities, tax | 237 |  | (23) |  | 618 | 115
Reclassification from AOCI, Current Period, Tax |  |  | 0 |  |  | 0
Other Comprehensive Income (Loss), Tax |  |  | (23) |  |  | 115
AOCI, tax effect, period end | 563 | 326 | (153) | (130) | 563 | (153)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start | (954) | 163 | 383 | 794 | 163 | 794
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  |  | 1 |  |  | (2)
Other comprehensive income (loss), net of tax |  |  | 70 |  |  | (341)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End | (1,648) | (954) | 453 | 383 | (1,648) | 453
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member] |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Pre-tax AOCI activity, period start | 303 | 830 | 1,177 | 1,610 | 830 | 1,610
OCI, before Reclassifications, before Tax, Attributable to Parent | (143) |  | 74 |  | (560) | (257)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent | 78 |  | 104 |  | 188 | 206
Other Comprehensive Income (Loss), before Tax | (221) |  | (30) |  | (748) | (463)
Pre-tax AOCI activity, period end | 82 | 303 | 1,147 | 1,177 | 82 | 1,147
AOCI, tax, effect, period start | (75) | (209) | (297) | (406) | (209) | (406)
Other Comprehensive Income (Loss) before Reclassifications, Tax | 34 |  | (18) |  | 140 | 65
Reclassification from AOCI, Current Period, Tax | (20) |  | (26) |  | (48) | (52)
Other Comprehensive Income (Loss), Tax | 54 |  | 8 |  | 188 | 117
AOCI, tax effect, period end | (21) | (75) | (289) | (297) | (21) | (289)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start | 228 | 621 | 880 | 1,204 | 621 | 1,204
Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent | (58) |  | (78) |  | (140) | (154)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax | (167) |  | (22) |  | (560) | (346)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End | 61 | 228 | 858 | 880 | 61 | 858
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |
Pre-tax AOCI activity, period start | (639) | (647) | (879) | (892) | (647) | (892)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | 8 |  | 14 |  | 16 | 27
Pre-tax AOCI activity, period end | (631) | (639) | (865) | (879) | (631) | (865)
AOCI, tax, effect, period start | 161 | 163 | 222 | 225 | 163 | 225
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax | (1) |  | (4) |  | (3) | (7)
AOCI, tax effect, period end | 160 | 161 | 218 | 222 | 160 | 218
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start | (478) | (484) | (657) | (667) | (484) | (667)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax | 7 |  | 10 |  | 13 | 20
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period End | $ (471) | $ (478) | $ (647) | $ (657) | $ (471) | $ (647)

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