Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended		4 Months Ended	6 Months Ended
		Mar. 05, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2020	Jun. 30, 2019	Mar. 31, 2020	Dec. 31, 2019
OTA Deferred Tax Liability:
Common units issued in connection with settlement of Liquidity Option (in units)						54,807,352
Liquidity Option liability		$ 511.9
Current portion of income tax provision (benefit):
Federal			$ 2.2	$ (0.4)		$ 2.3	$ 0.5
State			4.1	7.5		8.7	16.5
Foreign			0.0	0.2		0.2	0.8
Total current portion			6.3	7.3		11.2	17.8
Deferred portion of income tax provision (benefit):
Federal		67.8	46.4	0.0		(126.4)	(0.1)
State		4.4	7.0	2.6		(4.3)	4.5
Foreign			0.0	(0.2)		0.0	(0.2)
Total deferred portion			53.4	2.4		(130.7)	4.2
Total provision for (benefit from) income taxes			59.7	9.7		(119.5)	22.0
Reconciliation of the provision for (benefit from) income taxes [Abstract]
Pre-Tax Net Book Income ("NBI")			1,120.5	1,246.2		2,316.3	2,538.9
Texas Margin Tax	[1]		7.0	10.1		14.7	21.0
State income tax provision (benefit), net of federal benefit	[2]		3.2	0.1		(8.1)	0.3
Federal income tax provision (benefit) computed by applying the federal statutory rate to NBI of corporate entities			49.5	(0.5)		(58.3)	0.7
Federal benefit attributable to settlement of Liquidity Option	[2]		0.0	0.0		(67.8)	0.0
Total provision for (benefit from) income taxes			$ 59.7	$ 9.7		$ (119.5)	$ 22.0
Effective income tax rate			5.30%	0.80%		(5.20%)	0.90%
Deferred tax liabilities:
Attributable to investment in OTA			$ 375.2		$ 375.2	$ 375.2
Attributable to property, plant and equipment			105.6		105.6	105.6			$ 100.2
Attributable to investments in other entities			3.4		3.4	3.4			3.3
Total deferred tax liabilities			484.2		484.2	484.2			103.5
Less: Deferred tax assets:
Net operating loss carryovers	[3]		0.1		0.1	0.1			0.1
Temporary differences related to Texas Margin Tax			2.5		2.5	2.5			3.0
Total deferred tax assets			2.6		2.6	2.6			3.1
Total net deferred tax liabilities			481.6		481.6	481.6			$ 100.4
Oiltanking Holding Americas, Inc. [Member]
OTA Deferred Tax Liability:
Change in fair value of common units during period	[4]				$ (301.4)
Blended federal and state tax rate					22.40%
Change in deferred tax liability due to change in fair value of common units					$ (67.4)
Other, including interim allocations of taxable income					2.9
Deferred portion of income tax provision (benefit):
Total provision for (benefit from) income taxes		(72.2)	50.5		(64.5)	(136.7)
Reconciliation of the provision for (benefit from) income taxes [Abstract]
Total provision for (benefit from) income taxes		(72.2)	50.5		(64.5)	(136.7)
Deferred tax liabilities:
Total deferred tax liabilities		$ 439.7	$ 375.2		$ 375.2	$ 375.2
Enterprise Products Partners L.P. [Member]
OTA Deferred Tax Liability:
Closing price (in dollars per unit)		$ 23.67	$ 18.17		$ 18.17	$ 18.17		$ 14.30

[1] Although the Texas Margin Tax is not considered a state income tax, it has the characteristics of an income tax since it is determined by applying a tax rate to a base that considers our Texas-sourced revenues and expenses.

[2] The total benefit recognized in income tax expense on March 5, 2020 from settlement of the Liquidity Option was $72.2 million, which is comprised of $4.4 million of state income tax benefit and $67.8 million of federal income tax benefit.

[3] These losses expire in various years between 2020 and 2037 and are subject to limitations on their utilization.

[4] The market price of EPD common units declined from $23.67 per unit at March 5, 2020 (settlement date of the Liquidity Option) to $18.17 per unit on June 30, 2020.