Accounts Receivable - Additional Information (Details) - USD ($)	9 Months Ended
	Sep. 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	656,000,000	$ 614,000,000
Securitization Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Securitized accounts receivable facility	$ 950,000,000