Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Supplemental Cash Flow Information [Abstract]
Cash paid during the period for interest, net of amounts capitalized	$ 395	$ 61
Non-cash distributions to affiliates for conveyance of assets	0	253
Balance in property, plant and equipment, net funded with accounts payable and accrued liabilities (including affiliate)	$ 243	$ 296