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Comprehensive Income | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Comprehensive Income | 14. COMPREHENSIVE INCOME The following tables detail the changes in the balances of each component of accumulated other comprehensive income for the affected periods:
|  | Unrealized Gains (Losses) on Available- for Sale Securities (1) |  | Amortization of Postretirement Benefit (1) |  | Gain (Loss) on Foreign Currency Translation (1) |  | Credit Risk Changes of Fair Value Option Liabilities (1) (2) |  | Total
Year ended December 31, 2021: |  |  |  |  |  |  |  |  |  |
Beginning Balance |  | $ | 166 |  |  | $ | 5 |  |  | $ | (92) |  |  | $ | — |  |  | $ | 79 |
Other comprehensive income (loss) before reclassifications |  | (5) |  |  | — |  |  | (8) |  |  | — |  |  | (13) |
Amounts reclassified from accumulated other comprehensive income (loss) |  | (7) |  |  | (1) |  |  | — |  |  | (1) |  |  | (9) |
Net current period other comprehensive income (loss) |  | (12) |  |  | (1) |  |  | (8) |  |  | (1) |  |  | (21) |
Balance at December 31, 2021 |  | $ | 154 |  |  | $ | 4 |  |  | $ | (100) |  |  | $ | (1) |  |  | $ | 58 |
Year ended December 31, 2020: |  |  |  |  |  |  |  |  |  |
Beginning Balance |  | $ | 151 |  |  | $ | 8 |  |  | $ | (116) |  |  | $ | (2) |  |  | $ | 42 |
Other comprehensive income before reclassifications |  | 36 |  |  | (2) |  |  | 23 |  |  | — |  |  | 58 |
Amounts reclassified from accumulated other comprehensive income |  | (21) |  |  | (1) |  |  | — |  |  | 1 |  |  | (21) |
Net current period other comprehensive income (loss) |  | 15 |  |  | (3) |  |  | 23 |  |  | 1 |  |  | 37 |
Balance at December 31, 2020 |  | $ | 166 |  |  | $ | 5 |  |  | $ | (92) |  |  | $ | — |  |  | $ | 79 |
(1)All amounts are net of tax and noncontrolling interest. Amounts in parentheses indicate reductions to Accumulated Other Comprehensive Income. (2)Represents the changes in fair value attributable to instrument-specific credit risk of liabilities for which the fair value option is elected. The following table details the significant amounts reclassified from each component of accumulated other comprehensive income, shown in the above rollforward tables, for the affected periods:
Details about Accumulated Other Comprehensive Income Components | Amount Reclassified from Accumulated Other Comprehensive Income |  | Affected Line Item in the Consolidated Statement of Total Comprehensive Income
Year Ended December 31, |
2021 |  | 2020 |
Unrealized Gains (Losses) on Available-for-Sale Securities (1) |  |  |  |  |
| $ | (7) |  |  | $ | (22) |  |  | Net realized investment gains (losses)
| (1) |  |  | 1 |  |  | Provision for income taxes
| $ | (7) |  |  | $ | (21) |  |  | Net of tax and noncontrolling interest
Amortization of Postretirement Benefit |  |  |  |  |
Prior service cost | $ | (1) |  |  | $ | (1) |  |  | Other income
Actuarial gains (losses) | — |  |  | — |  |  | Other income
| (1) |  |  | (1) |  |  | Total before tax
| — |  |  | — |  |  | Provision for income taxes
| $ | (1) |  |  | $ | (1) |  |  | Net of tax and noncontrolling interest
Credit Risk Changes of Fair Value Option Liabilities |  |  |  |  |
| $ | (1) |  |  | $ | 2 |  |  | Credit risk changes of fair value option liabilities
| — |  |  | — |  |  | Provision for income taxes
| (1) |  |  | 1 |  |  | Net of tax and noncontrolling interest
Total reclassifications for the period | $ | (9) |  |  | $ | (21) |  |  | Net of tax and noncontrolling interest
(1)Net unrealized investment gains (losses) on available for sale securities are included in Ambac's Consolidated Statements of Comprehensive Income as a component of Accumulated Other Comprehensive Income. Changes in these amounts include reclassification adjustments to exclude from "Other comprehensive income (loss)" those items that are included as part of "Net income" for a period that has been part of "Other comprehensive income (loss)" in earlier periods.

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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=123367319&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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