Redeemable Noncontrolling Interest (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended
	Apr. 30, 2018	Mar. 31, 2020	Dec. 31, 2019
Redeemable noncontrolling interests		$ 745	$ 739
Preferred Stock, Redemption Price Per Share		$ 775
USAC [Member]
Redeemable noncontrolling interests		$ 477
ETO [Member]
Redeemable noncontrolling interests		15
SemCAMS [Member]
Redeemable noncontrolling interests		$ 253
Preferred Stock, Shares Outstanding		300,000
Preferred Units [Member] | USAC [Member]
Preferred Units, Issued		500,000
Distribution Made to Limited Partner, Distributions Declared, Per Unit	$ 24.375
Preferred Units [Member] | SemCAMS [Member]
Preferred Units, Issued		315,859
Canada, Dollars
Preferred Stock, Redemption Price Per Share		$ 1,100