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Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2023
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(a) |  | Adjustments(b) |  | Obligations |  | Total
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
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $0, $(8), $0 and $0, respectively | ​ |  | — | ​ |  | (24) | ​ |  | (65) | ​ |  | 1 | ​ |  | (88)
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $1, $0, $0 and $0, respectively | ​ |  | 3 | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | 2
Net current period other comprehensive income (loss) | ​ |  | 3 | ​ |  | (24) | ​ |  | (65) | ​ |  | — | ​ |  | (86)
Balance, December 31, 2022 | ​ | $ | 3 | ​ | $ | 19 | ​ | $ | (94) | ​ | $ | 3 | ​ | $ | (69)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $5, $(4), $0 and $2, respectively | ​ |  | 16 | ​ |  | (11) | ​ |  | 26 | ​ |  | 4 | ​ |  | 35
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $(1), $0, $0 and $0, respectively | ​ |  | (2) | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | (3)
Net current period other comprehensive income (loss) | ​ |  | 14 | ​ |  | (11) | ​ |  | 26 | ​ |  | 3 | ​ |  | 32
Balance, December 31, 2023 | ​ | $ | 17 | ​ | $ | 8 | ​ | $ | (68) | ​ | $ | 6 | ​ | $ | (37)
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(a) | In 2023, we recognized a $23 million unrealized loss, net of a deferred tax benefit of $8 million, associated with our investment in redeemable preferred stock due to the estimated fair value being less than the remaining carrying value.
(b) | As a result of the divestiture of certain non-strategic Canadian operations in 2021, we reclassified $35 million of cumulative foreign currency translation adjustments from accumulated other comprehensive income to (gain) loss from divestitures, asset impairments and unusual items, net within our Consolidated Statement of Operations.

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