Accounts Receivable - Additional Information (Details)	3 Months Ended
	Mar. 31, 2019 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maximum undivided ownership interest pooled accounts receivable amount sold	$ 1,200,000,000
Securitization Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Securitized accounts receivable facility	$ 1,200,000,000