Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Supplemental Cash Flow Information [Abstract]
Cash paid during the period for interest, net of amounts capitalized	$ 483	$ 355
Balance in property, plant and equipment, net funded with accounts payable and accrued liabilities (including affiliate)	$ 208	$ 690