Debt Notes (Details) (USD $)	3 Months Ended			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013 Term Loan [Member]	Mar. 31, 2014 Unsecured Debt [Member]
Debt Instrument [Line Items]
Term Loan Principal Amount			$ 750,000,000
Notes, net	$ 5,477,656,000	$ 5,477,088,000
Debt Instrument, Maturity Date Range, End	Dec. 31, 2026
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	0.04%			1.32%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	7.25%			7.57%
Weighted Average Interest Rate	4.92%