Revenue Contract Balances (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Financing Receivable, after Allowance for Credit Loss	$ 113,000,000		$ 109,000,000
Financing Receivable, Allowance for Credit Loss	13,000,000
Contract with Customer, Liability	131,000,000		$ 117,000,000
Contract with Customer, Liability, Revenue Recognized	10,000,000	$ 3,000,000
Mong Duong Subsidiary [Member]
Financing Receivable, after Allowance for Credit Loss	1,400,000,000
Financing Receivable, Allowance for Credit Loss	$ 34,000,000