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Valuation and Qualifying Accounts (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance as of Beginning of Period $ 663.6 $ 1,428.0 $ 1,421.8
Additions 66.7 96.1 90.1
Retirements (69.4) (875.9) (70.0)
Other Changes 16.2 15.4 (13.9)
Balance as of End of Period 677.1 663.6 1,428.0
Allowance for Doubtful Accounts
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance as of Beginning of Period 35.4 30.7 14.5
Additions 11.8 5.9 19.0
Retirements (13.9) (4.2) (1.8)
Other Changes 1.2 3.0 (1.0)
Balance as of End of Period 34.5 35.4 30.7
Allowance for deferred tax assets
      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance as of Beginning of Period 628.2 1,397.3 1,407.3
Additions 54.9 90.2 71.1
Retirements (55.5) (871.7) (68.2)
Other Changes 15.0 12.4 (12.9)
Balance as of End of Period $ 642.6 $ 628.2 $ 1,397.3