Long-Term Debt (8.875% Senior Notes, Due 2015 Narrative) (Details) (Senior Notes at 8.875, Due 2015 [Member], Senior Notes [Member], USD $)	1 Months Ended			12 Months Ended	1 Months Ended
	Jul. 31, 2012	Mar. 31, 2012	Jul. 31, 2007	Dec. 31, 2011	Dec. 31, 2011 December 7, 2011 Cash Tender Offer [Member]	Mar. 31, 2012 March 21, 2012 Cash Tender Offer [Member]	Jul. 31, 2012 July 18, 2012 Cash Tender Offer [Member]	Aug. 31, 2012 August 17, 2012 Redemption Offer Exercise [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date			Jul. 15, 2015
Debt Instrument, Face Amount			$ 3,000,000,000
Debt Instrument, Interest Rate, Stated Percentage			8.875%
Debt Extinguishment Date					Dec. 07, 2011	Mar. 21, 2012	Jul. 18, 2012	Aug. 17, 2012
Extinguishment of Debt, Amount	934,300,000	850,000,000		1,000,000,000	1,000,000,000	850,000,000	639,700,000	294,600,000
Debt Outstanding, Prior to Entinguishment of Portion					$ 2,800,000,000	$ 1,800,000,000	$ 934,300,000	$ 294,600,000