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Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Reconciliation of Plan Asset Measured Using Level 3 Inputs (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of period $ 970.0 $ 1,044.0
Foreign exchange impact (64.1) (62.1)
Fair value of plan assets at end of period 987.2 970.0
Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of period 116.9  
Fair value of plan assets at end of period 136.0 116.9
U.S. and International [Member] | Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at beginning of period 116.9 123.2
Gains on assets still held at end of year 5.4 6.1
Purchases, sales, issuance, and settlements 1.6 (1.1)
Transfers in and/or out of Level 3 22.6 (4.9)
Foreign exchange impact (10.5) (6.4)
Fair value of plan assets at end of period $ 136.0 $ 116.9