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Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Consolidated Statements Of Comprehensive Income [Abstract] |  |
Net income | $ 49.8 | $ 60.6
Other comprehensive income, net of tax: |  |
Unrealized loss on securities, net of tax of $0.1 for 2013 | 0.1 | 0.1
Other comprehensive income | 0.1 | 0.1
Comprehensive income | $ 49.9 | $ 60.7

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