Employee Benefit and Retirement Plans - Composition of International Pension Plan Assets (Detail) - International - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 579.9	$ 531.5
Fair Value Measurements, Subtotal
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	572.3	501.5
NAV-based assets
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	7.6	30.0
Equity securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	5.2	23.4
Equity securities and funds | Fair Value Measurements, Subtotal
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	3.1	14.3
Equity securities and funds | NAV-based assets
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	2.1	9.1
Fixed income securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	300.8	273.3
Fixed income securities and funds | Fair Value Measurements, Subtotal
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	298.3	266.7
Fixed income securities and funds | NAV-based assets
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	2.5	6.6
Other contract
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	273.9	234.8
Other contract | Fair Value Measurements, Subtotal
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	270.9	220.5
Other contract | NAV-based assets
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	3.0	14.3
Level 1
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	309.5	287.2
Level 1 | Equity securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	3.1	14.3
Level 1 | Fixed income securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	298.3	266.7
Level 1 | Other contract
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	8.1	6.2
Level 2
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	254.8	204.9
Level 2 | Equity securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		0.0
Level 2 | Fixed income securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		0.0
Level 2 | Other contract
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	254.8	204.9
Level 3
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	8.0	9.4
Level 3 | Equity securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		0.0
Level 3 | Fixed income securities and funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets		0.0
Level 3 | Other contract
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, fair value of plan assets	$ 8.0	$ 9.4