CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions	Total	Noncontrolling Interests	Limited Partners Class A Shares
Beginning balance at Dec. 31, 2019	$ 14,485	$ 12,330	$ 2,155
Increase (Decrease) in Partners' Capital
Net income/(loss)	(2,556)	(1,991)	(565)
Distributions (Note 7)	(496)	(397)	(99)
Deferred tax asset	13		13
Other comprehensive income/(loss)	(212)	(159)	(53)
Contributions from noncontrolling interests	10	10
Other	9	(5)	14
Ending balance at Jun. 30, 2020	11,253	9,788	1,465
Beginning balance at Mar. 31, 2020	11,186	9,729	1,457
Increase (Decrease) in Partners' Capital
Net income/(loss)	137	121	16
Distributions (Note 7)	(184)	(151)	(33)
Deferred tax asset	(7)		(7)
Other comprehensive income/(loss)	116	86	30
Contributions from noncontrolling interests	2	2
Other	3	1	2
Ending balance at Jun. 30, 2020	11,253	9,788	1,465
Beginning balance at Dec. 31, 2020	11,190	9,726	1,464
Increase (Decrease) in Partners' Capital
Net income/(loss)	181	180	1
Distributions (Note 7)	(365)	(295)	(70)
Deferred tax asset	(7)	0	(7)
Other comprehensive income/(loss)	108	79	29
Repurchase of common units by a subsidiary (Note 7)	(53)	(54)	1
Contributions from noncontrolling interests	1	1
Other	6	3	3
Ending balance at Jun. 30, 2021	11,061	9,640	1,421
Beginning balance at Mar. 31, 2021	11,499	9,976	1,523
Increase (Decrease) in Partners' Capital
Net income/(loss)	(212)	(143)	(69)
Distributions (Note 7)	(179)	(144)	(35)
Repurchase of common units by a subsidiary (Note 7)	(50)	(51)	1
Other	3	2	1
Ending balance at Jun. 30, 2021	$ 11,061	$ 9,640	$ 1,421