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Summary of Restructuring Activities (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restructuring Charges Excluding Pension OPEB Charges
      
Restructuring Cost and Reserve [Line Items]      
Accrual as of beginning of period $ 44.2 $ 62.5 $ 42.1
Current year charges 75.4 55.1 51.1
Utilization Cash (66.1) (67.4) (29.7)
Utilization Non-cash (9.2) (6.0) (1.0)
Accrual as of end of period 44.3 44.2 62.5
Employee termination benefits
      
Restructuring Cost and Reserve [Line Items]      
Current year charges 54.1 45.4 44.5
Employee termination benefits | Restructuring Charges Excluding Pension OPEB Charges
      
Restructuring Cost and Reserve [Line Items]      
Accrual as of beginning of period 38.5 56.8 38.4
Current year charges 54.1 45.4 44.5
Utilization Cash (53.9) (63.7) (26.1)
Accrual as of end of period 38.7 38.5 56.8
Asset Impairment Charge | Restructuring Charges Excluding Pension OPEB Charges
      
Restructuring Cost and Reserve [Line Items]      
Current year charges 9.2 6.0 1.0
Utilization Non-cash (9.2) (6.0) (1.0)
Contract termination costs
      
Restructuring Cost and Reserve [Line Items]      
Current year charges 2.8 1.9 19.6
Contract termination costs | Restructuring Charges Excluding Pension OPEB Charges
      
Restructuring Cost and Reserve [Line Items]      
Accrual as of beginning of period 5.7 5.7 3.7
Current year charges 0.3 1.9 2.5
Utilization Cash (0.4) (1.9) (0.5)
Accrual as of end of period 5.6 5.7 5.7
Other related costs
      
Restructuring Cost and Reserve [Line Items]      
Current year charges 11.8 1.8 3.1
Other related costs | Restructuring Charges Excluding Pension OPEB Charges
      
Restructuring Cost and Reserve [Line Items]      
Current year charges 11.8 1.8 3.1
Utilization Cash $ (11.8) $ (1.8) $ (3.1)