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Accumulated Other Comprehensive Income (Loss) | 9 Months Ended
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Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) |
Accumulated Other Comprehensive Income (Loss) | 10. 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 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(a) |  | Obligations |  | Total
December 31, 2019 | ​ | $ | (24) | ​ | $ | 38 | ​ | $ | (21) | ​ | $ | (1) | ​ | $ | (8)
Other comprehensive income (loss) before reclassifications, net of tax expense (benefit) of $1, $3, $0 and $0, respectively | ​ |  | 4 | ​ |  | 7 | ​ |  | (23) | ​ |  | — | ​ |  | (12)
Amounts reclassified from accumulated other comprehensive (income) loss, net of tax (expense) benefit of $2, $0, $0 and $0, respectively | ​ |  | 5 | ​ |  | — | ​ |  | — | ​ |  | (1) | ​ |  | 4
Net current period other comprehensive income (loss) | ​ |  | 9 | ​ |  | 7 | ​ |  | (23) | ​ |  | (1) | ​ |  | (8)
September 30, 2020 | ​ | $ | (15) | ​ | $ | 45 | ​ | $ | (44) | ​ | $ | (2) | ​ | $ | (16)
(a) | Foreign currency translation adjustments were impacted by a decrease in the Canadian/U.S. dollar exchange rate from 0.7698 at December 31, 2019 to 0.7507 at September 30, 2020.
We entered into interest rate derivatives during 2020, all of which were classified as a cash flow hedges and are discussed further in Note 3. We had no active derivatives outstanding during 2019. Amounts reclassified out of accumulated other comprehensive income (loss) associated with our previously terminated cash flow hedges were not material for the periods presented.

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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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(21)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(23)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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