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Accumulated Other Comprehensive (Loss) Income (Tables) | 9 Months Ended
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Sep. 30, 2024
Accumulated Other Comprehensive (Loss) Income |
Components of Accumulated Other Comprehensive Income (Loss), net of tax | The changes in the balances of each component of accumulated other comprehensive (loss) income, net of tax, which is included as a component of Waste Management, Inc. 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 |  | Obligations |  | Total
Balance, December 31, 2023 | ​ | $ | 17 | ​ | $ | 8 | ​ | $ | (68) | ​ | $ | 6 | ​ | $ | (37)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $(9), $3, $0 and $0, respectively | ​ |  | (26) | ​ |  | 10 | ​ |  | (22) | ​ |  | — | ​ |  | (38)
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $0, $0, $0 and $0, respectively | ​ |  | — | ​ | ​ | — | ​ |  | — | ​ | ​ | (1) | ​ |  | (1)
Net current period other comprehensive income (loss) | ​ |  | (26) | ​ |  | 10 | ​ |  | (22) | ​ |  | (1) | ​ |  | (39)
Balance, September 30, 2024 | ​ | $ | (9) | ​ | $ | 18 | ​ | $ | (90) | ​ | $ | 5 | ​ | $ | (76)
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