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Income Taxes - Quarter information (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019 | Dec. 31, 2019
Income Taxes |  |  |  |  |  |  |  |
Effective tax rate of income (loss) before income taxes | 24.50% |  |  | 19.40% |  | 21.40% | 22.20% |
Investment impairment |  |  |  |  | $ 52 |  |  | $ 52
Equity in net losses of unconsolidated entities | $ 16 |  |  | $ 14 |  | $ 56 | $ 39 |
Excess tax benefits associated with equity-based compensation | 2 |  |  | 5 |  | 25 | 22 |
Increase (decrease) to accruals and related deferred taxes |  |  |  | (13) |  | (6) | (13) |
Nondeductible acquisition transaction costs | 19 |  |  |  |  |  |  |
Asset impairments |  | $ 61 |  |  |  |  |  |
Landfill [Member] |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |
Asset impairments |  | $ 20 |  |  |  |  |  |
Investments Qualifying for Federal Tax Credits [Member] |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |
Equity in net losses of unconsolidated entities | 16 |  |  | 11 |  | 59 | 32 |
Income tax (expense) benefit, including tax credits, from equity method investment | 24 |  |  | 36 |  | 65 | 69 |
Interest expense | $ 3 |  |  | $ 2 |  | 9 | $ 6 |
Refined Coal Facility [Member] |  |  |  |  |  |  |  |
Income Taxes |  |  |  |  |  |  |  |
Equity method investments impairment charges |  |  | $ 7 |  |  | $ 7 |  |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228 + Details
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- Definition Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=121548190&loc=d3e32787-111569 + Details
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- Definition The increase (decrease) during the period in the amount due for taxes based on the reporting entity's earnings or attributable to the entity's income earning process (business presence) within a given jurisdiction. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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