Employee Benefit Plans (Reconciliation of Benefit Obligations, Plan Assets and Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Amount Recognized in Balance Sheet:
Other assets	$ 438.5	$ 514.8
Accrued compensation	(89.4)	(114.5)
Other Postretirement Benefits Plan
Change in Benefit Obligation:
Beginning balance	(26.8)	(26.0)
Service cost	0.0	(0.1)	$ (0.1)
Interest cost	(0.7)	(1.2)	(1.1)
Actuarial loss	(1.5)	(2.5)
Benefits paid	5.4	1.4
Actual expenses and taxes	0.0	0.0
Plan amendments	4.1	1.4
Curtailments	0.0	0.0
Settlements	0.0	0.0
Special termination benefits	5.8	0.0
Transfers	4.9	0.0
Foreign currency changes and other	1.1	0.2
Ending balance	(7.7)	(26.8)	(26.0)
Change in Plan Assets:
Beginning balance	0.0	0.0
Actual return on plan assets	0.0	0.0
Company contributions	10.2	1.4
Benefits paid	(5.3)	(1.4)
Settlements	0.0	0.0
Transfers	(4.9)	0.0
Foreign currency changes and other	0.0	0.0
Ending balance	0.0	0.0	0.0
Funded Status:
Funded status at end of year	(7.7)	(26.8)
Amount Recognized in Balance Sheet:
Other assets	0.0	0.0
Accrued compensation	(3.6)	(4.2)
Employee benefit plans liability	(4.1)	(22.6)
Net amount recognized	(7.7)	(26.8)
Pretax Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss	1.9	2.4
Prior service (credit) cost	(5.3)	(1.7)
Total pretax amount recognized	(3.4)	0.7
U.S. | Pension Plan
Change in Benefit Obligation:
Beginning balance	(71.7)	(74.7)
Service cost	(1.2)	(1.7)	(2.9)
Interest cost	(1.4)	(2.3)	(2.3)
Actuarial loss	(6.2)	(5.8)
Benefits paid	12.6	12.8
Actual expenses and taxes	0.0	0.0
Plan amendments	0.0	0.0
Curtailments	0.0	0.0
Settlements	0.0	0.0
Special termination benefits	0.0	0.0
Transfers	0.0	0.0
Foreign currency changes and other	0.0	0.0
Ending balance	(67.9)	(71.7)	(74.7)
Change in Plan Assets:
Beginning balance	63.3	62.7
Actual return on plan assets	8.0	12.3
Company contributions	1.0	1.1
Benefits paid	(12.6)	(12.8)
Settlements	0.0	0.0
Transfers	0.0	0.0
Foreign currency changes and other	0.0	0.0
Ending balance	59.7	63.3	62.7
Funded Status:
Funded status at end of year	(8.2)	(8.4)
Amount Recognized in Balance Sheet:
Other assets	0.0	0.0
Accrued compensation	(0.9)	(1.1)
Employee benefit plans liability	(7.4)	(7.3)
Net amount recognized	(8.3)	(8.4)
Pretax Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss	19.6	24.3
Prior service (credit) cost	(0.1)	(0.1)
Total pretax amount recognized	19.5	24.2
Supplemental Information:
Accumulated benefit obligation	66.8	70.4
Plans with Projected Benefit Obligation in Excess of Plan Assets:
Projected benefit obligation	67.9	71.7
Fair value plan assets	59.7	63.3
Plans with Accumulated Benefit Obligation in Excess of Plan Assets:
Accumulated benefit obligation	7.3	7.3
Fair value plan assets	0.0	0.0
Non-U.S. Plans | Pension Plan
Change in Benefit Obligation:
Beginning balance	(685.9)	(617.0)
Service cost	(4.3)	(4.0)	(4.7)
Interest cost	(11.7)	(15.3)	(15.4)
Actuarial loss	(61.8)	(71.5)
Benefits paid	27.8	27.4
Actual expenses and taxes	0.5	0.4
Plan amendments	0.0	0.0
Curtailments	0.0	0.8
Settlements	1.1	6.6
Special termination benefits	0.0	0.0
Transfers	0.0	0.0
Foreign currency changes and other	(33.2)	(13.3)
Ending balance	(767.5)	(685.9)	(617.0)
Change in Plan Assets:
Beginning balance	695.4	615.8
Actual return on plan assets	62.0	89.0
Company contributions	3.3	7.3
Benefits paid	(27.8)	(27.4)
Settlements	(1.1)	(6.6)
Transfers	0.0	0.0
Foreign currency changes and other	30.2	17.3
Ending balance	762.0	695.4	$ 615.8
Funded Status:
Funded status at end of year	(5.5)	9.5
Amount Recognized in Balance Sheet:
Other assets	103.1	100.6
Accrued compensation	(2.1)	(1.9)
Employee benefit plans liability	(106.5)	(89.1)
Net amount recognized	(5.5)	9.6
Pretax Amounts Recognized in Accumulated Other Comprehensive Loss:
Net actuarial loss	204.7	183.8
Prior service (credit) cost	1.5	1.4
Total pretax amount recognized	206.2	185.2
Supplemental Information:
Accumulated benefit obligation	200.6	181.9
Plans with Projected Benefit Obligation in Excess of Plan Assets:
Projected benefit obligation	220.1	197.5
Fair value plan assets	111.5	106.5
Plans with Accumulated Benefit Obligation in Excess of Plan Assets:
Accumulated benefit obligation	190.1	176.2
Fair value plan assets	$ 98.3	$ 98.2