XML 36 R86.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Taxes - Roll-Forward of Unrecognized Tax Benefits and Associated Accrued Interest and Penalties (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Contingency [Line Items]      
Opening balance at January 1 $ 12.8 $ 12.6 $ 8.6
Additions related to tax positions taken in the current period   0.2 5.2
Additions for tax positions of prior periods 0.8 0.2 0.7
Reductions due to lapsed statutes of limitations (0.6) (0.2)  
Reductions for tax positions of prior periods     (1.9)
Closing balance at December 31 13.0 12.8 12.6
Current (6.8) (3.0) (3.2)
Non-current 6.2 9.8 9.4
Interest and Penalties [Member]
      
Income Tax Contingency [Line Items]      
Opening balance at January 1 0.6 0.4 0.3
Additions related to tax positions taken in the current period   0 0
Additions for tax positions of prior periods 0.6 0.2 0.2
Reductions due to lapsed statutes of limitations (0.1) 0  
Reductions for tax positions of prior periods     (0.1)
Closing balance at December 31 1.1 0.6 0.4
Current (0.6) (0.3) (0.3)
Non-current 0.5 0.3 0.1
Unrecognized Tax Benefits [Member]
      
Income Tax Contingency [Line Items]      
Opening balance at January 1 12.2 12.2 8.3
Additions related to tax positions taken in the current period   0.2 5.2
Additions for tax positions of prior periods 0.2 0 0.5
Reductions due to lapsed statutes of limitations (0.5) (0.2)  
Reductions for tax positions of prior periods     (1.8)
Closing balance at December 31 11.9 12.2 12.2
Current (6.2) (2.7) (2.9)
Non-current $ 5.7 $ 9.5 $ 9.3