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Components of Other Comprehensive Income (Loss) | 3 Months Ended
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Mar. 31, 2021
Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Components of Other Comprehensive Income (Loss) | Components of Other Comprehensive Income (Loss) The following table provides the changes in accumulated other comprehensive income (loss) by component, net of tax, for the three months ended March 31, 2021 and 2020:
(Dollars in millions) |  | Securities AFS |  | Cash Flow Hedges |  | Pension and Post-retirement Plans |  | Total
Balance as of January 1, 2021 |  | $ | 108 |  |  | $ | 12 |  |  | $ | (260) |  |  | $ | (140) |
Net unrealized gains (losses) |  | (103) |  |  | (3) |  |  | 2 |  |  | (104) |
Amounts reclassified from AOCI |  | — |  |  | 1 |  |  | 2 |  |  | 3 |
Other comprehensive income (loss) |  | (103) |  |  | (2) |  |  | 4 |  |  | (101) |
Balance as of March 31, 2021 |  | $ | 5 |  |  | $ | 10 |  |  | $ | (256) |  |  | $ | (241) |
(Dollars in millions) |  | Securities AFS |  | Cash Flow Hedges |  | Pension and Post-retirement Plans |  | Total
Balance as of January 1, 2020 |  | $ | 31 |  |  | $ | 3 |  |  | $ | (273) |  |  | $ | (239) |
Net unrealized gains (losses) |  | 89 |  |  | 13 |  |  | — |  |  | 102 |
Amounts reclassified from AOCI |  | — |  |  | — |  |  | 2 |  |  | 2 |
Other comprehensive income (loss) |  | 89 |  |  | 13 |  |  | 2 |  |  | 104 |
Balance as of March 31, 2020 |  | $ | 120 |  |  | $ | 16 |  |  | $ | (271) |  |  | $ | (135) |
Reclassifications from AOCI, and related tax effects, were as follows:
(Dollars in millions) |  | Three Months Ended March 31, |  |  |  |  |  |
Details about AOCI |  | 2021 |  | 2020 |  |  |  |  |  | Affected line item in the statement where net income is presented
Cash flow hedges: |  |  |  |  |  |  |  |  |  |
Realized (gains) losses on cash flow hedges |  | $ | 2 |  |  | $ | — |  |  |  |  |  |  | Interest and fees on loans and leases
Tax expense (benefit) |  | (1) |  |  | — |  |  |  |  |  |  | Income tax expense
|  | 1 |  |  | — |  |  |  |  |  |  |
Pension and Postretirement Plans: |  |  |  |  |  |  |  |  |  |
Amortization of prior service cost and net actuarial (gain) loss |  | 4 |  |  | 3 |  |  |  |  |  |  | All other expense
Tax expense (benefit) |  | (2) |  |  | (1) |  |  |  |  |  |  | Income tax expense
|  | 2 |  |  | 2 |  |  |  |  |  |  |
Total reclassification from AOCI |  | $ | 3 |  |  | $ | 2 |  |  |  |  |  |  |

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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