Defined Contribution and Defined Benefit Retirement Plans - Composition of Pension Plan Assets (Detail) - Pension Plans Defined Benefit [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 395.6	$ 486.0
Foreign Pension Plans Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	383.6	470.1	$ 481.8
D E
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	234.0	282.9
Other.
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	17.3	18.1
U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	12.0	15.9	$ 16.1
Fair Value Inputs Level1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	111.1	151.6
Fair Value Inputs Level1 [Member] \| Other.
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.4	0.4
Level 2
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	14.8	9.2
Level 3
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	259.0	310.3
Level 3 \| D E
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	234.0	282.9
Level 3 \| Other.
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	16.9	17.7
Assets Measured at NAV
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	10.7	14.9
Local Currency Equities Member \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.1	0.2
Local Currency Equities Member \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	2.3	3.1
Local Currency Equities Member \| Fair Value Inputs Level1 [Member] \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.1	0.2
Local Currency Equities Member \| Fair Value Inputs Level1 [Member] \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	2.3	3.1
Non Local Currency Equities \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	11.0	21.9
Non Local Currency Equities \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.7	5.9
Non Local Currency Equities \| Fair Value Inputs Level1 [Member] \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	11.0	21.9
Non Local Currency Equities \| Fair Value Inputs Level1 [Member] \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	4.7	5.9
Local Currency Fixed Income \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	72.9	89.3
Local Currency Fixed Income \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	21.8	25.1
Local Currency Fixed Income \| Fair Value Inputs Level1 [Member] \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	72.9	89.3
Local Currency Fixed Income \| Fair Value Inputs Level1 [Member] \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.0	15.9
Local Currency Fixed Income \| Level 2 \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	14.8	9.2
Other Investment Securities And Cash \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.6	0.8
Other Investment Securities And Cash \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	2.7	7.0
Other Investment Securities And Cash \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	1.2	1.0
Other Investment Securities And Cash \| Fair Value Inputs Level1 [Member] \| C A
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.6	0.8
Other Investment Securities And Cash \| Fair Value Inputs Level1 [Member] \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	2.4	6.4
Other Investment Securities And Cash \| Fair Value Inputs Level1 [Member] \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.9	0.6
Other Investment Securities And Cash \| Level 3 \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.3	0.6
Other Investment Securities And Cash \| Assets Measured at NAV \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.3	0.4
Non Local Currency Fixed Income \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.4	6.7
Non Local Currency Fixed Income \| Fair Value Inputs Level1 [Member] \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	8.4	6.7
Real Estate \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.8	9.1
Real Estate \| Level 3 \| N O
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.8	9.1
Equity \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	3.8	5.6
Equity \| Fair Value Inputs Level1 [Member] \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.3	0.4
Equity \| Assets Measured at NAV \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	3.5	5.2
Fixed Income \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	7.0	9.3
Fixed Income \| Fair Value Inputs Level1 [Member] \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	0.1
Fixed Income \| Assets Measured at NAV \| U S
Defined Benefit Plan Disclosure [Line Items]
Pension plan assets	$ 6.9	$ 9.3