Employee Benefit and Retirement Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Pension and other postretirement benefit plans, amounts that will be amortized from AOCI in next fiscal year, pre-tax	$ 20.3
Defined contribution plan, cost recognized	31.6	$ 24.8	$ 30.2
Defined Benefit Plan, Accumulated Benefit Obligation	$ 2,100.0	$ 1,900.0
Fair value, investments, entities that calculate net asset value per share, investment redemption, notice period	90 days
U.S.
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, estimated future employer contributions in next fiscal year	$ 14.7
International
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, estimated future employer contributions in next fiscal year	8.8
Minimum | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations range maximum		20.00%
Minimum | Fixed Income Investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations range maximum		40.00%
Minimum | Other contract
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations range maximum		10.00%
Maximum | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations range maximum		40.00%
Maximum | Fixed Income Investments
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations range maximum		60.00%
Maximum | Cash and other
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, target plan asset allocations range maximum		30.00%
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Net death benefits from life insurance policies, amount	311.0
Cash surrender value of life insurance	134.0	$ 135.0
Defined benefit plan, benefit obligation	$ 118.0	$ 115.0