Derivative Instrument and Hedging Activities - Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2013 Term Loan due 2015 [Member]	Sep. 30, 2013 Interest Rate Swap [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Term Loan due 2015 [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Interest Rate Swap, Ten Year Period [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Interest Rate Swap, Ten Year Period [Member]	Sep. 30, 2013 Interest Rate Swap [Member] Interest Rate Swap, Five Year Period [Member]	Dec. 31, 2011 Interest Rate Swap [Member] Interest Rate Swap, Five Year Period [Member]	Sep. 30, 2013 Interest Rate Swap [Member] LIBOR [Member] Junior Subordinated Debt [Member]
Derivative [Line Items]
Derivative notional amount			$ 475	$ 455	$ 450		$ 25
Settlement of Interest Rate Swaps	50
Debt instrument, three month LIBOR, basis spread on variable rate									3.0175%
Interest rate swap, period (in years)						10 years		5 years
Derivative fixed interest rate			3.63%
Debt, face amount		$ 455