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Accumulated Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2019
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 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, 2018 | ​ | $ | (32) | ​ | $ | 23 | ​ | $ | (76) | ​ | $ | (2) | ​ | $ | (87)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $0, $4, $0 and $0, respectively | ​ |  | — | ​ |  | 13 | ​ |  | 36 | ​ |  | — | ​ |  | 49
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $2, $0, $0 and $0, respectively | ​ |  | 6 | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | 5
Net current period other comprehensive income (loss) | ​ |  | 6 | ​ |  | 13 | ​ |  | 36 | ​ |  | (1) | ​ |  | 54
Balance, September 30, 2019 | ​ | $ | (26) | ​ | $ | 36 | ​ | $ | (40) | ​ | $ | (3) | ​ | $ | (33)

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=118930883&loc=SL7669686-108580 + Details
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