Profit Sharing, Retirement Savings Plans and Defined Benefit Pension Plans - Information for Plans with Accumulated Benefit Obligations in Excess of Plan Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 600.1	$ 543.5
Fair value of plan assets	435.3	384.9
U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	182.1	204.8
Fair value of plan assets	119.9	148.7
International | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	418.0	338.7
Fair value of plan assets	$ 315.4	$ 236.2