Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Cash Flow Information [Abstract]
Cash paid during the period for interest, net of amounts capitalized	$ 829	$ 719	$ 510
Balance in property, plant and equipment, net funded with accounts payable and accrued liabilities (including affiliate)	$ 291	$ 263	$ 273