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Assets and Liabilities of Discontinued Operations (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Assets and liabilities of discontinued operations    
Current assets $ 0.9 $ 0.8
Long-term assets 0.6 0.7
Financial service assets, net 0.5 0.5
Total assets of discontinued operations 2.0 2.0
Current liabilities 4.8 6.4
Long-term liabilities 8.2 8.6
Total liabilities of discontinued operations $ 13.0 $ 15.0