Consolidated Statement Of Equity - USD ($) $ in Millions		Total		AOCI	Non-controlling Interests	Predecessor Equity [Member]	Preferred Units [Member]	Common unitholders [Member]
Balance, Beginning at Dec. 31, 2018	[1]	$ 36,788		$ (42)	$ 7,903		$ 2,388	$ 26,539
Distributions to partners		(1,514)		0	0		(64)	(1,450)
Distributions to noncontrolling interests		(361)		0	(361)		0	0
Capital contributions from noncontrolling interests		140	[1]	0	140		0	0
Sale of noncontrolling interest in subsidiary		93		0	93		0	0
Other comprehensive loss, net of tax		8	[1]	8	0		0	0
Other, net		28		0	13		0	(15)
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests	[1]	1,219
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Excluding Portion Attributable to Redeemable Noncontrolling Interest		1,206		0	256		40	910
Balance, Ending at Mar. 31, 2019	[1]	36,388		(34)	8,044		2,364	26,014
Balance, Beginning at Dec. 31, 2018	[1]	36,788		(42)	7,903		2,388	26,539
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests		5,112
Balance, Ending at Dec. 31, 2019	[1]	37,666		(18)	8,018	$ 2,266	3,174	24,226
Distributions to partners		(2,630)		0	0	0	(80)	(2,550)
Distributions to noncontrolling interests		(340)		0	(340)	0	0	0
Units issued for cash		1,580		0	0	0	1,580	0
Capital contributions from noncontrolling interests		66		0	66	0	0	0
Proceeds from Contributions from Parent		0		0	333	(2,266)	0	1,933
Other comprehensive loss, net of tax		(19)		(19)	0	0	0	0
Other, net		(9)		0	3	0	3	(9)
Net income (loss), excluding amounts attributable to redeemable noncontrolling interests		(907)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Excluding Portion Attributable to Redeemable Noncontrolling Interest		(919)		0	(200)	0	77	(796)
Balance, Ending at Mar. 31, 2020		$ 35,395		$ (37)	$ 7,880	$ 0	$ 4,748	$ 22,804

[1] *As adjusted. See Note 1.