Retirement and Deferred Compensation Plans - Reconciliation of Changes in Benefit Obligations and the Statement of Funded Status of Plan (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan [Member]
Change in Benefit Obligation
Service cost	$ 15.5	$ 19.4	$ 22.0
Interest cost	21.1	8.7	6.1
Pension Plan [Member] | Foreign Plan [Member]
Change in Benefit Obligation
Benefit obligation, beginning of year	632.3	897.9
Service cost	15.5	19.4
Interest cost	20.1	8.2
Settlements	(66.4)	(57.4)
Transfers	26.9	31.1
Actuarial (gain) loss	43.3	(218.7)
Plan participant contributions	12.4	13.0
Benefits paid	(14.2)	(11.4)
Currency exchange rate changes	43.3	(49.8)
Benefit obligation, end of year	713.2	632.3	897.9
Change in Plan Assets
Fair value of plan assets, beginning of year	547.8	762.5
Actual return on plan assets	(30.3)	(166.7)
Settlements	66.4	57.4
Transfers	28.4	31.8
Plan participant contributions	12.4	13.0
Company contributions	17.6	17.1
Benefits paid	(14.2)	(11.4)
Currency exchange rate changes	(40.4)	(41.1)
Fair value of plan assets, end of year	596.3	547.8	762.5
Funded Status at End of Year
Funded status, end of year	117.0	84.5
Amounts Recognized
Noncurrent assets	8.8	26.6
Current liabilities	(1.0)	(1.2)
Noncurrent liabilities	(124.8)	(109.9)
Net amount recognized	(117.0)	(84.5)
Pension Plan [Member] | UNITED STATES
Change in Benefit Obligation
Benefit obligation, beginning of year	20.5	26.0
Service cost	0.0	0.0
Interest cost	1.0	0.5
Settlements	0.0	0.0
Transfers	0.0	0.0
Actuarial (gain) loss	(0.1)	(3.7)
Plan participant contributions	0.0	0.0
Benefits paid	(2.2)	(2.3)
Currency exchange rate changes	0.0	0.0
Benefit obligation, end of year	19.2	20.5	26.0
Change in Plan Assets
Fair value of plan assets, beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Settlements	0.0	0.0
Transfers	0.0	0.0
Plan participant contributions	0.0	0.0
Company contributions	2.2	2.3
Benefits paid	(2.2)	(2.3)
Currency exchange rate changes	0.0	0.0
Fair value of plan assets, end of year	0.0	0.0	0.0
Funded Status at End of Year
Funded status, end of year	(19.2)	(20.5)
Amounts Recognized
Noncurrent assets	0.0	0.0
Current liabilities	(2.2)	(2.4)
Noncurrent liabilities	(17.0)	(18.1)
Net amount recognized	(19.2)	(20.5)
Postretirement Health Coverage [Member]
Change in Benefit Obligation
Benefit obligation, beginning of year	11.5	14.1
Interest cost	0.5	0.3	0.2
Actuarial (gain) loss	(1.0)	(2.1)
Benefits paid	(0.8)	(0.8)
Benefit obligation, end of year	10.2	11.5	$ 14.1
Funded Status at End of Year
Funded status, end of year	(10.2)	(11.5)
Amounts Recognized
Current liabilities	(1.1)	(1.2)
Noncurrent liabilities	(9.1)	(10.3)
Net amount recognized	$ (10.2)	$ (11.5)