Employee Benefit Plans (Plans' Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Changes in plan assets:
Fair value of plan assets at beginning of year	$ 179.7
Fair value of plan assets at end of year	184.3	$ 179.7
Pension Benefits [Member]
Pension and Postretirement Benefit Plans recognized in financial statements
Accumulated benefit obligation	266.1	273.2
Changes in projected benefit obligation:
Benefit obligation at beginning of year	276.2	241.5
Service cost	6.1	5.5	$ 4.9
Interest cost	5.1	6.6	10.2
Amendments	0.0	(0.1)
Actuarial (gain) loss	(11.2)	27.2
Effect of exchange rates	(0.7)	2.2
Settlements and curtailments	(2.1)	(1.3)
Benefits paid	(4.2)	(5.6)
Benefit obligation at end of year	269.2	276.2	241.5
Changes in plan assets:
Fair value of plan assets at beginning of year	179.7	154.3
Actual gain return on plan assets	9.5	27.3
Employer contribution	1.5	3.4
Effect of exchange rates	(0.1)	1.6
Plan settlements	(2.1)	(1.3)
Benefits paid	(4.2)	(5.6)
Fair value of plan assets at end of year	184.3	179.7	$ 154.3
Funded status / net amount recognized	(84.9)	(96.5)
Net amount recognized consists of:
Non-current assets	6.5	5.0
Current liability	(8.1)	(9.0)
Non-current liability	(83.3)	(92.5)
Net amount recognized	$ (84.9)	$ (96.5)