Benefit Plans Benefit Plans - Summary of Benefit Plan (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Change in accumulated other comprehensive income
Prior service cost occurring during the year		$ 0.0	$ (0.4)	$ 0.0
Net actuarial gains (losses) recognized due to curtailment		0.0	0.0	(1.5)
Acquired benefit plans and other		7.7	(1.5)	0.0
Pension Benefits
Change in plan assets
Employer contributions		34.5
Other Benefits
Change in benefit obligation
Benefit obligation at beginning of year		9.9	10.8
Service cost		0.0	0.0	0.0
Interest cost		0.4	0.4	0.5
Actuarial (gain) loss		(1.6)	(0.5)
Plan participant contributions		0.0	0.0
Benefits paid		(0.8)	(0.8)
Plan amendments		0.0	0.0
Special termination benefits		0.0	0.0
Settlements		0.0	0.0
Foreign currency impact		0.0	0.0
Acquired benefit plans and other		7.4	0.0
Benefit obligation at end of year		15.3	9.9	10.8
Change in plan assets
Fair value of plan assets at beginning of year		0.0	0.0
Actual return on plan assets		0.0	0.0
Employer contributions		0.8	0.8
Plan participant contributions		0.0	0.0
Benefits paid		(0.8)	(0.8)
Foreign currency impact		0.0	0.0
Acquired benefit plans and other		0.0	0.0
Settlements		0.0	0.0
Fair value of plan assets at end of year		0.0	0.0	0.0
Funded status		(15.3)	(9.9)
Amounts recognized in balance sheets
Assets for Plan Benefits, Defined Benefit Plan		0.0	0.0
Current liabilities		1.1	1.1
Noncurrent liabilities	[1]	14.2	8.8
Unrecognized net actuarial loss	[2]	(6.3)	(0.5)
Unrecognized prior service cost (benefit)	[2]	0.0	0.0
Net amount recognized		9.0	9.4
Change in accumulated other comprehensive income
Balance at beginning of year		(0.5)	(1.1)
Prior service cost occurring during the year		0.0	0.0
Net actuarial losses recognized during the year		0.0	0.0
Net actuarial losses recognized due to settlement		0.0	0.0
Acquired benefit plans and other		(7.4)	0.0
Foreign currency impact		0.0	0.0
Balance at end of year		(6.3)	(0.5)	(1.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		1.6	0.6
Foreign Plan [Member] | Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year		452.0	546.9
Service cost		11.0	10.5	5.5
Interest cost		6.2	5.7	2.7
Actuarial (gain) loss		(3.5)	7.5
Plan participant contributions		1.4	1.3
Benefits paid		(17.3)	(10.0)
Plan amendments		0.0	(0.8)
Special termination benefits		0.0	0.1
Settlements		7.7	191.4
Foreign currency impact		(18.1)	59.2
Acquired benefit plans and other		2.5	23.0
Benefit obligation at end of year		426.5	452.0	546.9
Change in plan assets
Fair value of plan assets at beginning of year		359.5	482.9
Actual return on plan assets		2.2	12.7
Employer contributions		16.9	1.3
Plan participant contributions		1.4	1.3
Benefits paid		(17.3)	(10.0)
Foreign currency impact		(14.4)	51.7
Acquired benefit plans and other		0.3	11.0
Settlements		(7.7)	(191.4)
Fair value of plan assets at end of year		340.9	359.5	482.9
Funded status		(85.6)	(92.5)
Amounts recognized in balance sheets
Assets for Plan Benefits, Defined Benefit Plan		0.0	6.9
Current liabilities		3.2	3.2
Noncurrent liabilities	[1]	82.4	96.2
Unrecognized net actuarial loss	[2]	19.0	27.7
Unrecognized prior service cost (benefit)	[2]	0.7	0.8
Net amount recognized		105.3	121.0
Change in accumulated other comprehensive income
Balance at beginning of year		28.5	27.7
Prior service cost occurring during the year		0.0	0.9
Net actuarial losses recognized during the year		(0.7)	(0.4)
Net actuarial losses recognized due to settlement		(2.2)	(0.6)
Acquired benefit plans and other		(0.3)	(3.0)
Foreign currency impact		(0.6)	3.2
Balance at end of year		19.8	28.5	27.7
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		(4.9)	0.7
U.S. Plans | Pension Benefits
Change in benefit obligation
Benefit obligation at beginning of year		569.0	554.5
Service cost		3.9	3.9	3.5
Interest cost		20.6	22.9	24.7
Actuarial (gain) loss		41.3	(17.9)
Plan participant contributions		0.0	0.0
Benefits paid		(30.0)	(30.2)
Plan amendments		0.0	0.0
Special termination benefits		0.0	0.0
Settlements		0.0	0.0
Foreign currency impact		0.0	0.0
Acquired benefit plans and other		0.0	0.0
Benefit obligation at end of year		522.2	569.0	554.5
Change in plan assets
Fair value of plan assets at beginning of year		378.7	351.7
Actual return on plan assets		(20.3)	53.6
Employer contributions		17.6	3.6
Plan participant contributions		0.0	0.0
Benefits paid		(30.0)	(30.2)
Foreign currency impact		0.0	0.0
Acquired benefit plans and other		0.0	0.0
Settlements		0.0	0.0
Fair value of plan assets at end of year		346.0	378.7	351.7
Funded status		(176.2)	(190.3)
Amounts recognized in balance sheets
Assets for Plan Benefits, Defined Benefit Plan		0.0	0.3
Current liabilities		3.4	3.5
Noncurrent liabilities	[1]	172.7	187.1
Unrecognized net actuarial loss	[2]	151.3	154.4
Unrecognized prior service cost (benefit)	[2]	0.0	0.0
Net amount recognized		24.8	35.9
Change in accumulated other comprehensive income
Balance at beginning of year		(154.4)	(170.1)
Prior service cost occurring during the year		0.0	0.0
Net actuarial losses recognized during the year		6.6	5.9
Net actuarial losses recognized due to settlement		0.0	0.0
Acquired benefit plans and other		0.0	0.0
Foreign currency impact		0.0	0.0
Balance at end of year		(151.4)	(154.4)	$ (170.1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax		$ (3.6)	$ 9.8

[1] Included in the consolidated balance sheets in pensions, post-retirement and other benefits

[2] Represents amounts in accumulated other comprehensive loss that have not yet been recognized as components of net periodic benefit cost.