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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule Of Accumulated Other Comprehensive Income (Loss) | The following table presents a reconciliation of the changes in the components of accumulated other comprehensive (loss) income and details the components of other comprehensive (loss) income for the years ended December 31, 2021, 2020 and 2019, including the amount of income tax expense (benefit) allocated to each component of other comprehensive (loss) income.
(in millions) |  |  |  |  |
Years Ended December 31 | 2021 |  | 2020 |  | 2019
Accumulated net unrealized (losses) gains on investment securities: |  |  |  |  |
Balance at beginning of period, net of tax | $ | 211 |  |  | $ | 65 |  |  | $ | (138) |
Net unrealized holding (losses) gains arising during the period | (406) |  |  | 191 |  |  | 257 |
Less: (Benefit) provision for income taxes | (96) |  |  | 45 |  |  | 60 |
Net unrealized holding (losses) gains arising during the period, net of tax | (310) |  |  | 146 |  |  | 197 |
Less: |  |  |  |  |
Net realized losses included in net securities losses | — |  |  | — |  |  | (8) |
Less: Benefit for income taxes | — |  |  | — |  |  | (2) |
Reclassification adjustment for net securities losses included in net income, net of tax | — |  |  | — |  |  | (6) |
Change in net unrealized (losses) gains on investment securities, net of tax | (310) |  |  | 146 |  |  | 203 |
Balance at end of period, net of tax | $ | (99) |  |  | $ | 211 |  |  | $ | 65 |
Accumulated net gains on cash flow hedges: |  |  |  |  |
Balance at beginning of period, net of tax | $ | 155 |  |  | $ | 34 |  |  | $ | — |
Net cash flow hedge (losses) gains arising during the period | (35) |  |  | 229 |  |  | 44 |
Less: (Benefit) provision for income taxes | (8) |  |  | 56 |  |  | 10 |
Change in net cash flow hedge gains arising during the period, net of tax | (27) |  |  | 173 |  |  | 34 |
Less: |  |  |  |  |
Net cash flow hedge gains included in interest and fees on loans | 95 |  |  | 70 |  |  | — |
Less: Provision for income taxes | 22 |  |  | 18 |  |  | — |
Reclassification adjustment for net cash flow hedge gains included in net income, net of tax | 73 |  |  | 52 |  |  | — |
Change in net cash flow hedge gains, net of tax | (100) |  |  | 121 |  |  | 34 |
Balance at end of period, net of tax (a) | $ | 55 |  |  | $ | 155 |  |  | $ | 34 |
Accumulated defined benefit pension and other postretirement plans adjustment: |  |  |  |  |
Balance at beginning of period, net of tax (b) | $ | (302) |  |  | $ | (415) |  |  | $ | (548) |
Actuarial gain arising during the period (b) | 159 |  |  | 128 |  |  | 157 |
Prior service credit arising during the period | 1 |  |  | — |  |  | — |
Net defined benefit pension and other postretirement plans adjustment arising during the period | 160 |  |  | 128 |  |  | 157 |
Less: Provision for income taxes (b) | 38 |  |  | 31 |  |  | 36 |
Net defined benefit pension and other postretirement plans adjustment arising during the period, net of tax (b) | 122 |  |  | 97 |  |  | 121 |
Amounts recognized in other noninterest expenses: |  |  |  |  |
Amortization of actuarial net loss (b) | 40 |  |  | 47 |  |  | 42 |
Amortization of prior service credit | (25) |  |  | (27) |  |  | (27) |
Total amounts recognized in other noninterest expenses (b) | 15 |  |  | 20 |  |  | 15 |
Less: Provision for income taxes (b) | 3 |  |  | 4 |  |  | 3 |
Adjustment for amounts recognized as components of net periodic benefit cost during the period, net of tax (b) | 12 |  |  | 16 |  |  | 12 |
Change in defined benefit pension and other postretirement plans adjustment, net of tax (b) | 134 |  |  | 113 |  |  | 133 |
Balance at end of period, net of tax (b) | $ | (168) |  |  | $ | (302) |  |  | $ | (415) |
Total accumulated other comprehensive (loss) income at end of period, net of tax | $ | (212) |  |  | $ | 64 |  |  | $ | (316) |
(a)The Corporation expects to reclassify $47 million of net gains, net of tax, from accumulated other comprehensive loss to earnings over the next twelve months if interest yield curves and notional amounts remain at December 31, 2021 levels. (b)Balances at beginning and end of period, net of tax, and changes for the years ended December 31, 2020 and 2019 have been recast to reflect the retrospective application of the Corporation's election to change the accounting method for certain components of the qualified defined benefit pension plan as of January 1, 2021. Refer to Note 1 for further information.

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