Receivables - Additional Information (Detail)		9 Months Ended	12 Months Ended
	Mar. 30, 2012 USD ($)	Sep. 30, 2016 USD ($) Agreement	Dec. 31, 2015 USD ($)
Schedule Of Financial Receivables [Line Items]
Number of arrangement with different financial institution to sell customer receivables | Agreement		3
Deferred purchase price receivable	$ 254,000,000	$ 162,000,000	$ 249,000,000
Net cash funding received since inception		350,000,000
Amount of cash draws under arrangement since inception		1,608,000,000
Amount of cash repayments under arrangement since inception		1,258,000,000
Net cash funding received during the period		100,000,000
Amount of cash draws under arrangement during the period		300,000,000
Amount of cash repayments under arrangement during the period		200,000,000
Accounts receivables		28,738,000,000
Cash collections of other receivables		28,226,000,000
Minimum [Member]
Schedule Of Financial Receivables [Line Items]
Funding of customer receivables sold		200,000,000
Maximum [Member]
Schedule Of Financial Receivables [Line Items]
Funding of customer receivables sold		$ 400,000,000