Other Income, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Interest income	$ 26	$ 12	$ 8
Adjustment to Deferred Compensation Expense		6	(6)
Net Foreign Currency Transaction Gains (Losses)	$ 2	(7)	8
Equity income from investments in Trinidad		$ 2	$ 3