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Acquisitions and Divestitures - Divestitures (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Divestitures |  |  |  |
Gain (loss) on sale of assets | $ 40 |  | $ 96 | $ 38
Disposed of by Sale, Not Discontinued Operations [Member] |  |  |  |
Divestitures |  |  |  |
Aggregate sales prices for divestitures of hauling and ancillary operations |  | $ 8 | 153 | 62
Gain (loss) on sale of assets |  |  | $ 96 | $ 38
Disposed of by Sale, Not Discontinued Operations [Member] | Maximum [Member] |  |  |  |
Divestitures |  |  |  |
Gain (loss) on sale of assets |  | $ (1) |  |

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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