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Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Other comprehensive income (loss) on a pre-tax and after-tax basis |
Components of other comprehensive income (loss) on a pre-tax and after-tax basis
($ in millions) |  | Three months ended June 30,
| 2020 |  | 2019
| Pre-tax |  | Tax |  | After-tax |  | Pre-tax |  | Tax |  | After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets |  | $ | 2,796 |  |  | $ | (590 | ) |  | $ | 2,206 |  |  | $ | 921 |  |  | $ | (194 | ) |  | $ | 727 |
Less: reclassification adjustment of realized capital gains and losses |  | 169 |  |  | (35 | ) |  | 134 |  |  | 57 |  |  | (12 | ) |  | 45 |
Unrealized net capital gains and losses |  | 2,627 |  |  | (555 | ) |  | 2,072 |  |  | 864 |  |  | (182 | ) |  | 682 |
Unrealized foreign currency translation adjustments |  | 11 |  |  | (2 | ) |  | 9 |  |  | 5 |  |  | (1 | ) |  | 4 |
Unamortized pension and other postretirement prior service credit (1) |  | (14 | ) |  | 3 |  |  | (11 | ) |  | (14 | ) |  | 3 |  |  | (11 | )
Other comprehensive income (loss) |  | $ | 2,624 |  |  | $ | (554 | ) |  | $ | 2,070 |  |  | $ | 855 |  |  | $ | (180 | ) |  | $ | 675 |
|  | Six months ended June 30,
|  | 2020 |  | 2019
|  | Pre-tax |  | Tax |  | After-tax |  | Pre-tax |  | Tax |  | After-tax
Unrealized net holding gains and losses arising during the period, net of related offsets |  | $ | 1,363 |  |  | $ | (288 | ) |  | $ | 1,075 |  |  | $ | 2,208 |  |  | $ | (467 | ) |  | $ | 1,741 |
Less: reclassification adjustment of realized capital gains and losses |  | 456 |  |  | (96 | ) |  | 360 |  |  | 108 |  |  | (23 | ) |  | 85 |
Unrealized net capital gains and losses |  | 907 |  |  | (192 | ) |  | 715 |  |  | 2,100 |  |  | (444 | ) |  | 1,656 |
Unrealized foreign currency translation adjustments |  | (38 | ) |  | 8 |  |  | (30 | ) |  | 11 |  |  | (2 | ) |  | 9 |
Unamortized pension and other postretirement prior service credit (1) |  | (8 | ) |  | 1 |  |  | (7 | ) |  | (29 | ) |  | 6 |  |  | (23 | )
Other comprehensive income (loss) |  | $ | 861 |  |  | $ | (183 | ) |  | $ | 678 |  |  | $ | 2,082 |  |  | $ | (440 | ) |  | $ | 1,642 |
(1) Represents prior service credits reclassified out of other comprehensive income and amortized into operating costs and expenses.

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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e526-108580 + Details
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