Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans (Details 2)

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Benefit Plans (Details 2) (USD $)
In Millions
3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]        
SERP & SRIP $ 0.7 $ 0.7 $ 2.1 $ 2.3
Defined Contribution Plan 3.8 3.3 11.3 5.4
Benefit Cost $ 4.5 $ 4.0 $ 13.4 $ 7.7