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Consolidated Statements of Income and Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Fair value adjustments to cash flow hedges, tax | $ 6.5 | $ 15.3 | $ 2.3
Reclassification adjustment for cash flow hedges included in net income, tax | 1.2 | 0.7 | 0.5
Amortization of pension and postretirement plans actuarial loss and prior service cost, tax | 4.3 | 2.4 | 2.3
Unfunded employee benefit obligations, net of tax | $ 9.3 | $ 20.3 | $ 5.7

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- Definition Tax effect of the adjustment out of other comprehensive income for prior service costs and net loss recognized as a component of net periodic benefit cost during the period. + References No definition available. + Details
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- Definition Tax effect of the accumulated change in the value of either the projected benefit obligation or the plan assets resulting from experience different from that assumed or from a change in an actuarial assumption that has not been recognized in net periodic benefit cost. Also includes the tax effect of the cost (credit) resulting from a plan amendment that occurred during the period that has not been recognized in net periodic benefit cost. + References No definition available. + Details
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