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Acquisitions and Divestitures (Detail) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 08, 2016 USD ($) | Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($) item | Dec. 31, 2016 USD ($) item | May 31, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |  |
Number of business acquired | item |  | 32 | 24 | 30 |
Consideration, net of cash acquired, for business acquisitions |  | $ 471 | $ 205 | $ 604 |
Business acquisitions closed during the year, cash payments |  | 440 | 183 | 581 |
Other consideration |  | 31 | 22 | 23 |
Contingent consideration paid for acquisitions closed in previous year |  | 6 | 3 | 4 |
Purchase price holdbacks paid |  | 20 | 14 | 26 |
Purchase price holdbacks paid for acquisitions closed in current year |  | 15 | 13 | 16 |
Allocation of consideration to property and equipment |  | 115 | 127 | 115 |
Allocation of consideration to other intangible assets |  | 141 | 46 | 212 |
Allocation of consideration to goodwill |  | 248 | 39 | 280 |
Revolving Credit Facility [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Credit Facility, aggregate capacity |  | 2,750 |  |  | $ 2,250
Other Intangible Assets [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets |  | 1 |  |  |
Customer and Supplier Relationships [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets |  | 124 | 39 | 185 |
Covenants not-to-compete [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets |  | $ 16 | $ 7 | 23 |
Trade Name [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets |  |  |  | $ 4 |
Southern Waste Systems [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Consideration, net of cash acquired, for business acquisitions | $ 525 |  |  |  |
Allocation of consideration to property and equipment | 93 |  |  |  |
Allocation of consideration to other intangible assets | 182 |  |  |  |
Allocation of consideration to goodwill | 250 |  |  |  |
Southern Waste Systems [Member] | Customer and Supplier Relationships [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets | 160 |  |  |  |
Southern Waste Systems [Member] | Covenants not-to-compete [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets | 18 |  |  |  |
Southern Waste Systems [Member] | Trade Name [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Allocation of consideration to other intangible assets | $ 4 |  |  |  |

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