Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Estimated Future Benefit Payments (Detail) $ in Millions	Dec. 31, 2017 USD ($)
Defined Benefit Plan Disclosure [Line Items]
2018	$ 43.2
2019	38.4
2020	38.8
2021	42.2
2022	44.2
Thereafter	220.5
Total	427.3
U.S.
Defined Benefit Plan Disclosure [Line Items]
2018	13.4
2019	12.5
2020	12.0
2021	12.5
2022	13.5
Thereafter	62.3
Total	126.2
International
Defined Benefit Plan Disclosure [Line Items]
2018	29.8
2019	25.9
2020	26.8
2021	29.7
2022	30.7
Thereafter	158.2
Total	$ 301.1