Equity - Changes to Redeemable Noncontrolling Interest (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period			$ 2,268
Net income attributable to noncontrolling interest	$ 40	$ 44	136	$ 128
Distributions payable to noncontrolling interest			(131)
Redemption value adjustment			238
Balance at end of period	$ 2,511		$ 2,511