Long-Term Debt ( 5.125% Senior Notes, Due 2018 Narrative) (Details) (USD $)	1 Months Ended
	Aug. 31, 2012
Senior Secured Notes [Member] | Senior Secured Notes At 5.125 Due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Offering Date	Aug. 17, 2012
Debt Instrument, Face Amount	$ 1,600,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.125%
Debt Instrument, Earliest Redemption Date	Aug. 15, 2015
Secured Debt [Member] | Credit Facility, Term Loan B, Initial Funding [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 1,600,000,000
Period prior to August 15, 2015 with Redemption Limited to Using Proceeds from Public Equity Offering [Member] | Senior Secured Notes [Member] | Senior Secured Notes At 5.125 Due 2018 [Member]
Debt Instrument [Line Items]
Future Redemption Price of Debt During Eligibility Period, as a Percentage of Principal Amount	105.125%
Max Principal Redeemable Using Proceeds from a Public Equity Offering, as a Percentage of Principal Amount	35.00%
Period prior to August 15, 2015 [Member] | Senior Secured Notes [Member] | Senior Secured Notes At 5.125 Due 2018 [Member]
Debt Instrument [Line Items]
Minimum Period Notice for Redemption of Debt	30 days
Maximum Period Notice for Redemption of Debt	60 days
Period Subject to Redemption Price Commencing on Scheduled Date	12 months
Future Redemption Price of Debt During Eligibility Period, as a Percentage of Principal Amount	100.00%