Acquisitions - Additional Information (Detail)	1 Months Ended	12 Months Ended
	Jan. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Acquisition	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 311,000,000	$ 205,000,000	$ 346,000,000
Amortization Of Intangible Assets		21,000,000	13,000,000	$ 5,000,000
Acquisition related costs			6,000,000
Aggregate working capital adjustment			6,000,000
Revenues from business acquisition			341,000,000
Net loss from business acquisition			171,000,000
Maximum [Member] | Warehousing, Selling and Administrative [Member]
Business Acquisition [Line Items]
Recognized gain on acquisition		1,000,000
2016 Acquisition [Member]
Business Acquisition [Line Items]
Purchase price consideration		178,000,000
Purchase price consideration in cash		175,000,000
Goodwill		117,000,000
Intangible assets		45,000,000
Acquisition related costs		2,000,000
2016 Acquisition [Member] | Non-Compete [Member]
Business Acquisition [Line Items]
Intangible assets		$ 7,000,000
Intangible assets amortization period		2 years
Amortization Of Intangible Assets		$ 2,000,000
2016 Acquisition [Member] | Subsequent Event
Business Acquisition [Line Items]
Purchase price consideration, accrual	$ 3,000,000
Series of Individually Immaterial Business Acquisitions
Business Acquisition [Line Items]
Purchase price consideration in cash			544,000,000
Goodwill			276,000,000
Intangible assets			$ 103,000,000
Number of acquisitions completed | Acquisition			8
Business Acquisition Acquiree One [Member]
Business Acquisition [Line Items]
Business acquisition, maximum contingent consideration payments			$ 6,000,000
Business acquisition, fair value of contingent consideration payments as of acquisition date			$ 4,000,000