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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) |
Components of Accumulated Other Comprehensive Income (Loss), net of tax | The changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, which is included as a component of WMI stockholders’ equity, are as follows (in millions, with amounts in parentheses representing decreases to accumulated other comprehensive income):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Foreign | ​ | Post- | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Available- | ​ | Currency | ​ | Retirement | ​ | ​ | ​
​ | ​ | Derivative | ​ | for-Sale | ​ | Translation | ​ | Benefit | ​ | ​ | ​
​ |  | Instruments |  | Securities |  | Adjustments(a) |  | Obligations |  | Total
Balance, December 31, 2018 | ​ | $ | (32) | ​ | $ | 23 | ​ | $ | (76) | ​ | $ | (2) | ​ | $ | (87)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $0, $5, $0 and $1, respectively | ​ |  | — | ​ |  | 15 | ​ |  | 55 | ​ |  | 2 | ​ |  | 72
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $3, $0, $0 and $0, respectively | ​ |  | 8 | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | 7
Net current period other comprehensive income (loss) | ​ |  | 8 | ​ |  | 15 | ​ |  | 55 | ​ |  | 1 | ​ |  | 79
Balance, December 31, 2019 | ​ | $ | (24) | ​ | $ | 38 | ​ | $ | (21) | ​ | $ | (1) | ​ | $ | (8)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $2, $4, $0 and $1, respectively | ​ |  | 7 | ​ |  | 12 | ​ |  | 20 | ​ |  | 2 | ​ |  | 41
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $2, $0, $0 and $(1), respectively | ​ |  | 8 | ​ |  | (1) | ​ |  | — | ​ |  | (1) | ​ |  | 6
Net current period other comprehensive income (loss) | ​ |  | 15 | ​ |  | 11 | ​ |  | 20 | ​ |  | 1 | ​ |  | 47
Balance, December 31, 2020 | ​ | $ | (9) | ​ | $ | 49 | ​ | $ | (1) | ​ | $ | — | ​ | $ | 39
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $0, $(2), $0 and $2 respectively | ​ |  | — | ​ |  | (6) | ​ |  | 7 | ​ |  | 5 | ​ |  | 6
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $3, $0, $0 and $0, respectively | ​ |  | 9 | ​ |  | — | ​ |  | (35) | ​ |  | (2) | ​ |  | (28)
Net current period other comprehensive income (loss) | ​ |  | 9 | ​ |  | (6) | ​ |  | (28) | ​ |  | 3 | ​ |  | (22)
Balance, December 31, 2021 | ​ | $ | — | ​ | $ | 43 | ​ | $ | (29) | ​ | $ | 3 | ​ | $ | 17
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(a) | As a result of the divestiture of certain non-strategic Canadian operations in the third quarter of 2021, we reclassified $35 million of cumulative foreign currency translation adjustments from accumulated other comprehensive income to gain from divestitures, asset impairments and unusual items within our Consolidated Statement of Operations.

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