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Accumulated Other Comprehensive Income (Loss) | 12 Months Ended
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Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) |
Accumulated Other Comprehensive Income (Loss) | 13. Accumulated Other Comprehensive Income (Loss) The changes in the balances of each component of accumulated other comprehensive income (loss), net of tax, which is included as a component of WM 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, 2016 | ​ | $ | (40) | ​ | $ | 13 | ​ | $ | (47) | ​ | $ | (6) | ​ | $ | (80)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $0, $2, $0 and $1, respectively | ​ |  | — | ​ |  | 3 | ​ |  | 76 | ​ |  | 3 | ​ |  | 82
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $5, $(1), $0 and $0, respectively | ​ |  | 7 | ​ |  | (1) | ​ |  | — | ​ |  | — | ​ |  | 6
Net current period other comprehensive income (loss) | ​ |  | 7 | ​ |  | 2 | ​ |  | 76 | ​ |  | 3 | ​ |  | 88
Balance, December 31, 2017 | ​ | $ | (33) | ​ | $ | 15 | ​ | $ | 29 | ​ | $ | (3) | ​ | $ | 8
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $0, $2, $0 and $1, respectively | ​ |  | — | ​ |  | 5 | ​ |  | (105) | ​ |  | 2 | ​ |  | (98)
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $3, $0, $0 and $0, respectively | ​ |  | 8 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 8
Net current period other comprehensive income (loss) | ​ |  | 8 | ​ |  | 5 | ​ |  | (105) | ​ |  | 2 | ​ |  | (90)
Adoption of new accounting standard (a) | ​ | ​ | (7) | ​ | ​ | 3 | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | (5)
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)
(a) | As of January 1, 2018, we adopted ASU 2018-02 and reclassified stranded tax effects to retained earnings.
We had no derivatives outstanding during the reported periods. Amounts reclassified to interest expense associated with our previously terminated cash flow hedges were $11 million, or $8 million net of tax expense, for 2019, $11 million, or $8 million net of tax expense, for 2018 and $12 million, or $7 million net of tax expense, for 2017.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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