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Subsequent Events (Details) (USD $) In Millions	1 Months Ended
Subsequent Events (Details) (USD $) In Millions	Aug. 27, 2011
Subsequent Events
Total cash consideration	$ 205
Stock repurchased and retired, shares	3.2
Stock repurchased and retired, value	$ 40.0

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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