Equity-based Awards, Restricted Unit Awards (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]
Cash distributions paid to common unitholders			$ 1,778.3		$ 1,613.4
Restricted Common Unit Awards [Member]
Summary of awards activity, equity instruments other than options [Roll Forward]
Beginning of period (in units)			3,893,486
Granted (in units)			1,769,076	[1],[2]
Vested (in units)			(1,846,198)	[1]
Forfeited (in units)			(159,832)
End of period (in units)	3,656,532		3,656,532
Restricted units outstanding, weighted-average grant date fair value [Roll Forward]
Weighted-average grant date fair value per unit, at beginning of period (in dollars per unit)			$ 40.87
Granted weighted-average grant date fair value per unit (in dollars per unit)			$ 57.20	[1],[2]
Vested weighted-average grant date fair value per unit (in dollars per unit)			$ 34.77	[1]
Forfeited weighted-average grant date fair value per unit (in dollars per unit)			$ 47.40
Weighted-average grant date fair value per unit, at end of period (in dollars per unit)	$ 51.56		$ 51.56
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]
Aggregate grant date fair value			101.2
Estimated forfeiture rate (in hundredths)			3.90%
Equity based awards issued to independent directors of the entities' general partner (in units)			9,296
Cash distributions paid to common unitholders	2.6	2.5	8.2		7.9
Total intrinsic value of restricted common unit awards that vested during period	1.0	1.5	107.4		64.2
Unrecognized Compensation Expense [Abstract]
Unrecognized compensation cost	91.3		91.3
Recognition period for total unrecognized compensation cost			2 years
Restricted Common Unit Awards [Member] | Minimum [Member]
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]
Grant date market price of common units (in dollars per unit)			$ 57.11
Restricted Common Unit Awards [Member] | Maximum [Member]
Summary of awards activity, equity instruments other than options, additional disclosures [Abstract]
Grant date market price of common units (in dollars per unit)			$ 61.58
Restricted Common Unit Awards [Member] | Enterprise [Member]
Unrecognized Compensation Expense [Abstract]
Unrecognized compensation cost	$ 83.4		$ 83.4

[1] Includes awards granted to the independent directors of the board of directors of Enterprise GP as part of their annual compensation for 2013. A total of 9,296 restricted common unit awards were issued to the independent directors of Enterprise GP, which immediately vested upon issuance.

[2] The aggregate grant date fair value of restricted common unit awards issued during 2013 was $101.2 million based on a grant date market price of our common units ranging from $57.11 to $61.58 per unit. An estimated annual forfeiture rate of 3.9% was applied to these awards.