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Income Tax Matters, Provision Table (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Mar. 31, 2012 | Mar. 31, 2011
Tax Provision |  |
Domestic | $ 15.6 | $ 5.7
Foreign | 0.7 | 0.5
Total | $ 16.3 | $ 6.2

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