Reclassification out of Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Line Items]
Amount reclassified from AOCL to interest expense									$ 2,253.0		$ 2,100.3		$ 2,121.7
Related tax impact									(1,549.7)		(870.5)		(534.6)
Net loss	(1,752.0)	(761.8)	(209.2)	(216.7)	(476.5)	(503.4)	(241.8)	(281.1)	(2,939.8)	[1]	(1,502.8)	[1]	(704.1)
Accumulated Defined Benefit Plans Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Line Items]
Amount reclassified from AOCL to interest expense									0.7
Related tax impact									0
Net loss									0.7
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income (Line Items]
Amount reclassified from AOCL to interest expense									4.0		28.4		265.7
Related tax impact									(1.5)		(10.3)		(117.3)
Net loss									$ 2.5		$ 18.1		$ 148.4

[1] Amount rounds to zero.