Net Income per Limited Partner Unit Table - Income Reconciliation (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Reconciliation of income from continuing operations to income from continuing operations available to limited partners [Line Items]
Income from continuing operations	$ 1,161	$ 1,393	$ 3,549	$ 2,778
Less: Net income attributable to redeemable noncontrolling interests	12	12	38	24
Less: Income from continuing operations attributable to noncontrolling interest	317	1,010	931	1,667
Income from continuing operations, net of noncontrolling interests	832	371	2,580	1,087
Less: Series A Convertible Preferred Unitholders’ interest in income	0	0	0	33
Less: General Partner’s interest in income	1	1	3	3
Net Income (Loss) from Continuing Operations Available to Common Shareholders, Basic	$ 831	$ 370	$ 2,577	$ 1,051
Basic Income from Continuing Operations per Limited Partner Unit:
Weighted average limited partner units	2,624.9	1,158.2	2,621.9	1,117.7
Basic income from continuing operations per Limited Partner unit	$ 0.32	$ 0.32	$ 0.98	$ 0.94
Basic income (loss) from discontinued operations per Limited Partner unit	$ 0	$ 0
Diluted Income from Continuing Operations per Limited Partner Unit:
Dilutive effect of distributions to Series A Convertible Preferred Unitholders	$ 0	$ 0	$ 0	$ 33
Diluted income from continuing operations available to Limited Partners	$ 831	$ 370	$ 2,577	$ 1,084
Dilutive effect of Series A Convertible Preferred Units	0.0	0.0	0.0	40.5
Dilutive effect of unvested unit awards	10.6	0.0	11.0	0.0
Weighted average limited partner units, assuming dilutive effect of unvested unit awards	2,635.5	1,158.2	2,632.9	1,158.2
Diluted income from continuing operations per Limited Partner unit	$ 0.32	$ 0.32	$ 0.98	$ 0.94
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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Per unit of ownership amount after tax of income (loss) from continuing operations available to limited partnership (LP) unit-holder in a publicly trade limited partnership (LP) or master limited partnership (MLP).

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Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation.

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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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