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Accumulated Other Comprehensive Income (Loss) (Tables)
3 Months Ended
Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Three Months Ended
March 31,
2013
2012
Beginning balance
$ (291.9 ) $ (262.5 )
Amortization of actuarial (gains) losses, net (a)
$ 6.8 $ 6.0
Amortization of prior service costs (a)
0.2 0.4
Total reclassifications for the period, before tax
7.0 6.4
Income tax (expense) benefit
(2.6 ) (2.3 )
Amounts reclassified from accumulated other comprehensive income (loss), net of tax
4.4 4.1
Ending balance
$ (287.5 ) $ (258.4 )