Employee Benefit Plans (Plans' Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in plan assets:
Fair value of plan assets at beginning of year	$ 131.1
Fair value of plan assets at end of year	156.5	$ 131.1
Pension Benefits [Member]
Pension and Postretirement Benefit Plans recognized in financial statements
Accumulated benefit obligation	176.9	171.6
Changes in projected benefit obligation:
Benefit obligation at beginning of year	174.3	269.2
Service cost	2.1	3.8	$ 6.1
Interest cost	8.9	6.2	5.1
Actuarial (gain) loss	4.5	(74.6)
Effect of exchange rates	1.1	(3.4)
Adjustment upon sale of businesses	(4.8)	0.0
Settlements and curtailments	(0.5)	(21.7)
Benefits paid	(6.5)	(5.2)
Benefit obligation at end of year	179.1	174.3	269.2
Changes in plan assets:
Fair value of plan assets at beginning of year	131.1	184.3
Actual gain return on plan assets	16.4	(45.4)
Employer contribution	15.0	22.5
Effect of exchange rates	1.0	(3.4)
Plan settlements	(0.5)	(21.7)
Benefits paid	(6.5)	(5.2)
Fair value of plan assets at end of year	156.5	131.1	$ 184.3
Funded status / net amount recognized	(22.6)	(43.2)
Net amount recognized consists of:
Non-current assets	11.1	2.7
Current liability	(11.2)	(5.8)
Non-current liability	(22.5)	(40.1)
Net amount recognized	$ (22.6)	$ (43.2)