Property, Plant & Equipment - Net - Schedule of Capital Lease Assets (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Capital Leased Assets [Line Items]
Capital leases	$ 74,000,000	$ 3,000,000
Production plants
Capital Leased Assets [Line Items]
Capital leases	1,000,000	2,000,000
Transportation equipment and other
Capital Leased Assets [Line Items]
Capital leases	49,000,000	1,000,000
Buildings
Capital Leased Assets [Line Items]
Capital leases	$ 24,000,000	$ 0