CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions	Total	Partners’ Capital Excluding Noncontrolling Interests	Noncontrolling Interests	Limited Partners Series A Preferred Units Partners’ Capital Excluding Noncontrolling Interests	Limited Partners Series B Preferred Units Partners’ Capital Excluding Noncontrolling Interests	Limited Partners Common Units Partners’ Capital Excluding Noncontrolling Interests
Beginning balance at Dec. 31, 2020	$ 9,738	$ 9,593	$ 145	$ 1,505	$ 787	$ 7,301
Increase (Decrease) in Partners' Capital
Net income	423	422	1	37	12	373
Distributions (Note 7)	(185)	(179)	(6)	(37)	(12)	(130)
Other comprehensive income	108	108				108
Repurchase of common units (Note 7)	(3)	(3)				(3)
Contributions from noncontrolling interests	1		1
Other	2	2				2
Ending balance at Mar. 31, 2021	10,084	9,943	141	1,505	787	7,651
Beginning balance at Dec. 31, 2021	12,810	9,972	2,838	1,505	787	7,680
Increase (Decrease) in Partners' Capital
Net income	225	187	38	37	12	138
Distributions (Note 7)	(235)	(176)	(59)	(37)	(12)	(127)
Other comprehensive income	74	74				74
Repurchase of common units (Note 7)	(25)	(25)				(25)
Other	5	11	(6)			11
Ending balance at Mar. 31, 2022	$ 12,854	$ 10,043	$ 2,811	$ 1,505	$ 787	$ 7,751