Subsequent Events Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Aug. 31, 2011 Secured Debt [Member] Term Loan [Member]	Aug. 31, 2011 Secured Debt [Member] Revolving [Member]	Jul. 25, 2013 Secured Debt [Member] Subsequent Event [Member] Term Loan [Member]	Jul. 25, 2013 Secured Debt [Member] Subsequent Event [Member] Revolving [Member]
Subsequent Event [Line Items]
Secured Credit Facility Maximum Borrowing Amount	$ 1,700	$ 700	$ 700	$ 1,115	$ 850