Supplemental Cash Flow Disclosures (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Supplemental Cash Flow Disclosures [Abstract]
Interest expense, net of interest capitalized	$ 496.5	$ 524.6	$ 1,058.5	$ 998.0
Adjustments to reconcile to cash paid for interest:
Net change in accruals			22.8	8.4
Amortization of deferred finance charges			(52.5)	(37.8)
Net amortization of discounts and premiums			(111.1)	(78.1)
Amortization of accumulated other comprehensive loss			(14.3)	(19.9)
Rollover of PIK interest to principal			(0.5)	(0.6)
Change in fair value of derivative instruments			(17.1)	(10.0)
Cash paid for interest			885.7	860.0
Cash payments/(refunds) of income taxes, net			$ 9.4	$ (4.7)