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Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |
AOCI before Tax, Attributable to Parent |  | $ 793 | $ 1,759 | $ 1,771 | $ (120) | $ 1,759 | $ (120)
Other Comprehensive Income (Loss), before Tax |  | 78 |  | 403 |  | (888) | 2,294
AOCI before Tax, Attributable to Parent |  | 871 | 793 | 2,174 | 1,771 | 871 | 2,174
AOCI Tax, Attributable to Parent | [1] | (201) | (444) | (447) | 30 | (444) | 30
Unrealized holding gains (losses) on available for sale securities, tax |  | 23 |  | 61 |  | (115) | 212
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax |  | 0 |  | 0 |  | 0 | 0
Other Comprehensive Income (Loss), Tax | [1] | (19) |  | (101) |  | 224 | (578)
AOCI Tax, Attributable to Parent | [1] | (220) | (201) | (548) | (447) | (220) | (548)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start |  | 592 | 1,315 | 1,324 | (90) | 1,315 | (90)
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax) |  | 71 |  | 185 |  | (339) | 631
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax |  | (1) |  | (1) |  | (2) | (1)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax |  | 56 |  | 153 |  | (192) | 1,119
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax |  | (22) |  | 108 |  | (346) | 1,067
Other comprehensive income, net of tax |  | 59 | (723) | 302 | 1,414 | (664) | 1,716
Accumulated other comprehensive income, net |  | 651 | 592 | 1,626 | 1,324 | 651 | 1,626
Accumulated Net Unrealized Loss on Held To Maturity Securities [Member] |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |
AOCI before Tax, Attributable to Parent |  | (18) | (21) | (28) | (29) | (21) | (29)
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, before Tax | [2] | 1 |  | 1 |  | 4 | 2
AOCI before Tax, Attributable to Parent |  | (17) | (18) | (27) | (28) | (17) | (27)
AOCI Tax, Attributable to Parent | [1] | 4 | 5 | 7 | 7 | 5 | 7
Other Comprehensive Loss, Held-to-maturity Security, Reclassification Adjustment from AOCI for Noncredit Portion of OTTI, Tax | [1],[2] | 0 |  | 0 |  | (1) | 0
AOCI Tax, Attributable to Parent | [1] | 4 | 4 | 7 | 7 | 4 | 7
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start |  | (14) | (16) | (21) | (22) | (16) | (22)
Other Comprehensive Loss, Held-to-maturity Security, Adjustment from AOCI for Accretion of Noncredit Portion of OTTI, after Tax | [2] | 1 |  | 1 |  | 3 | 2
Accumulated other comprehensive income, net |  | (13) | (14) | (20) | (21) | (13) | (20)
Accumulated Net Unrealized Securities Available For Sale Gain (Loss) [Member] |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |
AOCI before Tax, Attributable to Parent |  | 513 | 1,062 | 871 | 274 | 1,062 | 274
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax |  | 94 |  | 246 |  | (454) | 843
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | [3] | (1) |  | (1) |  | (2) | (1)
Other Comprehensive Income (Loss), before Tax |  | 93 |  | 245 |  | (456) | 842
AOCI before Tax, Attributable to Parent |  | 606 | 513 | 1,116 | 871 | 606 | 1,116
AOCI Tax, Attributable to Parent | [1] | (130) | (268) | (220) | (69) | (268) | (69)
Unrealized holding gains (losses) on available for sale securities, tax | [1] | (23) |  | (61) |  | 115 | (212)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | [1],[3] | 0 |  | 0 |  | 0 | 0
Other Comprehensive Income (Loss), Tax | [1] | (23) |  | (61) |  | 115 | (212)
AOCI Tax, Attributable to Parent | [1] | (153) | (130) | (281) | (220) | (153) | (281)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start |  | 383 | 794 | 651 | 205 | 794 | 205
Unrealized holding gains (losses) arising during the period on securities available for sale (net of tax) |  | 71 |  | 185 |  | (339) | 631
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | [3] | (1) |  | (1) |  | (2) | (1)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax |  | (22) |  |  |  |  |
Other comprehensive income, net of tax |  | 70 |  | 184 |  | (341) | 630
Accumulated other comprehensive income, net |  | 453 | 383 | 835 | 651 | 453 | 835
Accumulated Net Gain (Loss) from Derivative Instruments Designated as Cash Flow Hedges [Member] |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |
AOCI before Tax, Attributable to Parent |  | 1,177 | 1,610 | 1,712 | 430 | 1,610 | 430
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax |  | 74 |  | 205 |  | (257) | 1,496
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, before Tax | [2] | (104) |  | (60) |  | (206) | (69)
Other Comprehensive Income (Loss), before Tax |  | (30) |  | 145 |  | (463) | 1,427
AOCI before Tax, Attributable to Parent |  | 1,147 | 1,177 | 1,857 | 1,712 | 1,147 | 1,857
AOCI Tax, Attributable to Parent | [1] | (297) | (406) | (431) | (108) | (406) | (108)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax | [1] | (18) |  | (52) |  | 65 | (377)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax | [1],[2] | 26 |  | 15 |  | 52 | 17
Other Comprehensive Income (Loss), Tax | [1] | 8 |  | (37) |  | 117 | (360)
AOCI Tax, Attributable to Parent | [1] | (289) | (297) | (468) | (431) | (289) | (468)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start |  | 880 | 1,204 | 1,281 | 322 | 1,204 | 322
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax |  | 56 |  | 153 |  | (192) | 1,119
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax | [2] | (78) |  | (45) |  | (154) | (52)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax |  |  |  | 108 |  | (346) | 1,067
Accumulated other comprehensive income, net |  | 858 | 880 | 1,389 | 1,281 | 858 | 1,389
Accumulated Defined Benefit Plans Adjustment [Member] |  |  |  |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |  |  |  |
AOCI before Tax, Attributable to Parent |  | (879) | (892) | (784) | (795) | (892) | (795)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | [4] | 14 |  | 12 |  | 27 | 23
AOCI before Tax, Attributable to Parent |  | (865) | (879) | (772) | (784) | (865) | (772)
AOCI Tax, Attributable to Parent | [1] | 222 | 225 | 197 | 200 | 225 | 200
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax | [1],[4] | (4) |  | (3) |  | (7) | (6)
AOCI Tax, Attributable to Parent | [1] | 218 | 222 | 194 | 197 | 218 | 194
Accumulated Other Comprehensive Income (Loss), Net of Tax, Period Start |  | (657) | (667) | (587) | (595) | (667) | (595)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax | [4] | 10 |  | 9 |  | 20 | 17
Accumulated other comprehensive income, net |  | $ (647) | $ (657) | $ (578) | $ (587) | $ (647) | $ (578)
[1] | The impact of all AOCI activity is shown net of the related tax impact, calculated using an effective tax rate of approximately 25%.
[2] | Reclassification amount is recognized in net interest income in the consolidated statements of income.
[3] | Reclassification amount is recognized in securities gains (losses), net in the consolidated statements of income.
[4] | Reclassification amount is recognized in other non-interest expense in the consolidated statements of income. Additionally, these accumulated other comprehensive income (loss) components are included in the computation of net periodic pension cost (see Note 7 for additional details).

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(a)(3)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669686-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(2)(ii) -URI http://asc.fasb.org/extlink&oid=121370832&loc=SL117420844-207641 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e681-108580 + Details
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