CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL - USD ($) $ in Millions	Total	Noncontrolling Interests	Limited Partners Class A Shares
Beginning balance at Dec. 31, 2018	$ 13,319	$ 11,473	$ 1,846
Increase (Decrease) in Partners' Capital
Net income/(loss)	1,340	1,127	213
Distributions (Note 9)	(579)	(474)	(105)
Deferred tax asset	27		27
Other comprehensive income/(loss)	109	84	25
Change in ownership interest in connection with Exchange Right exercises (Note 9)		(31)	31
Sale of noncontrolling interest in a subsidiary	128	128	0
Other	(2)	(1)	(1)
Ending balance at Jun. 30, 2019	14,342	12,306	2,036
Beginning balance at Mar. 31, 2019	14,022	12,067	1,955
Increase (Decrease) in Partners' Capital
Net income/(loss)	426	360	66
Distributions (Note 9)	(311)	(254)	(57)
Deferred tax asset	30		30
Other comprehensive income/(loss)	51	39	12
Change in ownership interest in connection with Exchange Right exercises (Note 9)		(31)	31
Sale of noncontrolling interest in a subsidiary	128	128	0
Other	(4)	(3)	(1)
Ending balance at Jun. 30, 2019	14,342	12,306	2,036
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 9)	(496)	(397)	(99)
Deferred tax asset	13		13
Other comprehensive income/(loss)	(212)	(159)	(53)
Change in ownership interest in connection with Exchange Right exercises (Note 9)		(10)	10
Contributions from noncontrolling interests (Note 9)	10	10
Other	9	5	4
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 9)	(184)	(151)	(33)
Deferred tax asset	(7)		(7)
Other comprehensive income/(loss)	116	86	30
Contributions from noncontrolling interests (Note 9)	2	2
Other	3	1	2
Ending balance at Jun. 30, 2020	$ 11,253	$ 9,788	$ 1,465