Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Total operating lease cost	$ 58	$ 173
Finance lease cost:
Interest on lease liabilities	0	1
Amortization of right-of-use assets	1	2
Total finance lease cost	1	3
Total lease cost	59	176
Variable lease costs	3	10
Short-term lease costs	1	4
Cost of sales, exclusive of depreciation and amortization
Lessee, Lease, Description [Line Items]
Total operating lease cost	8	26
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Total operating lease cost	$ 50	$ 147