v2.3.0.15

Dividends And Common Share Repurchases (Details) (USD $) In Millions, except Per Share data | 0 Months Ended | 3 Months Ended
--- | --- | ---
Sep. 15, 2011 | Jun. 15, 2011 | May 18, 2011 | Mar. 15, 2011 | Mar. 31, 2011
Dividends And Common Share Repurchases |  |  |  |  |
Dividend per common share to shareholders | $ 0.26 | $ 0.26 |  | $ 0.26 |
Aggregate amount of authorized share repurchase program |  |  | $ 500.0 |  |
Number of shares repurchased during the period |  |  |  |  | 2.7
Aggregate cost of shares repurchased during the period |  |  |  |  | $ 174.8
Average share price of repurchased shares |  |  |  |  | $ 65.84

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