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Non-Cash Compensation Plans Unit-based compensation Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2018	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares		Dec. 31, 2016 USD ($) $ / shares
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ 0	$ (1,812)		$ 0
ET Unit Based Compensation Plans [Member]
Weighted Average Grant-Date Fair Value Per Unit, Awards granted | $ / shares		$ 13.00	$ 17.01		$ 16.37
Fair Value Of Units As Of The Vesting Date		$ 49	$ 40		$ 40
Unvested awards | shares		22.4	19.5	[1]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 228
Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Term		2 years 8 months 17 days
Subsidiary Unit Based Compensation [Member]
Fair Value Of Units As Of The Vesting Date		$ 22	$ 9		$ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 45
Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Term		3 years 4 months 1 day
ETE Merger [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	1.28
[1] In connection with the Energy Transfer Merger, ET assumed the former ETO plans, including the related unvested awards. Outstanding awards under the former ETO plans are reflected for the entire period above. Amounts related to the period prior to the Energy Transfer Merger are adjusted for the 1.28 to 1 conversion ratio that was applied in the merger.

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Unrecognized cost of unvested share-based compensation awards.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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