Equity and Distributions, Reclassfications out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ 208.3	$ 199.7	$ 604.4	$ 572.8
Revenue	(12,093.3)	(10,468.7)	(34,625.7)	(31,511.0)
Operating costs and expenses	11,273.5	9,659.8	32,061.1	29,136.5
Total	(592.8)	(587.9)	(1,901.4)	(1,810.6)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total	22.3		36.1
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges [Member] | Interest rate derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	7.7		21.4
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges [Member] | Commodity derivatives [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Revenue	14.6		15.1
Operating costs and expenses	$ 0		$ (0.4)