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Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended
	Aug. 07, 2012	Jun. 30, 2012	Jul. 25, 2011
Subsequent events (Textual) [Abstract]
Repurchase of shares of common stock	5.0
Value of repurchase of shares of common stock	$ 185.0
Company's credit facility		$ 925	$ 1,000

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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