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Earnings Per Share and Capital Structure Stock Repurchase Plan (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	11 Months Ended
	Oct. 24, 2011	Sep. 30, 2012	Sep. 30, 2012
Stock Repurchase Program, Authorized Amount	$ 100
Shares repurchased to date			70.1
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 29.9

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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