Accounts Receivable - Additional Information (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum undivided ownership interest pooled accounts receivable amount sold	$ 950,000,000
Short-term debt outstanding	713,000,000	$ 614,000,000
Securitization Facility [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Securitized accounts receivable facility	$ 950,000,000