Net Income per Limited Partner Unit Table - Income Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reconciliation of income from continuing operations to income from continuing operations available to limited partners [Line Items]
Income from continuing operations	$ 1,208	$ 659	$ 2,388	$ 1,385
Less: Net income attributable to redeemable noncontrolling interests	13	0	26	0
Less: Income from continuing operations attributable to noncontrolling interest	317	303	614	657
Income from continuing operations, net of noncontrolling interests	878	356	1,748	728
Less: Series A Convertible Preferred Unitholders’ interest in income	0	12	0	33
Less: General Partner’s interest in income	1	1	2	2
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic	$ 877	$ 343	$ 1,746	$ 693
Basic Income from Continuing Operations per Limited Partner Unit:
Weighted average limited partner units	2,621.2	1,114.8	2,620.3	1,097.1
Basic income from continuing operations per Limited Partner unit	$ 0.33	$ 0.31	$ 0.67	$ 0.63
Basic income (loss) from discontinued operations per Limited Partner unit	$ 0	$ 0		$ (0.01)
Diluted Income from Continuing Operations per Limited Partner Unit:
Dilutive effect of distributions to Series A Convertible Preferred Unitholders	$ 0	$ 12	$ 0	$ 33
Diluted income from continuing operations available to Limited Partners	$ 877	$ 355	$ 1,746	$ 726
Dilutive effect of Series A Convertible Preferred Units	0.0	43.4	0.0	61.1
Dilutive effect of unvested unit awards	9.8	0.0	9.8	0.0
Weighted average limited partner units, assuming dilutive effect of unvested unit awards	2,631.0	1,158.2	2,630.1	1,158.2
Diluted income from continuing operations per Limited Partner unit	$ 0.33	$ 0.31	$ 0.66	$ 0.63
Diluted income (loss) from discontinued operations per Limited Partner unit	$ 0	$ 0	$ 0	$ (0.01)

The amount of net income (loss) allocated to the Convertible Unitholders.

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Weighted average number of limited partnership units outstanding determined by relating the portion of time within a reporting period that limited partnership units have been outstanding to the total time in that period.

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