Leases - Schedule of Components of Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lessee, Lease, Description [Line Items]
Total operating lease cost	$ 58	$ 115
Finance lease cost:
Interest on lease liabilities	1	1
Amortization of right-of-use assets	0	1
Total finance lease cost	1	2
Total lease cost	59	117
Variable lease costs	3	7
Short-term lease costs	2	3
Cost of sales, exclusive of depreciation and amortization
Lessee, Lease, Description [Line Items]
Total operating lease cost	9	18
Selling, general and administrative
Lessee, Lease, Description [Line Items]
Total operating lease cost	$ 49	$ 97