Benefit Plans and Other Postretirement Benefits, Other disclosures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated other comprehensive income (loss), before tax
Net loss	$ 265.7	$ 256.4
Net prior service cost	10.5	9.0
Net transition asset		(0.1)
Pension Benefits
Expected to be amortized from Accumulated other comprehensive loss over next fiscal year
Net loss that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year	22.9
Prior service cost that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year	2.7
Defined Benefit Plan, Contributions
Plan contributions by employer	26.2	24.1	$ 23.8
Estimated future employer contribution in next fiscal year	25.0
Expected benefits payments
2017	30.6
2018	31.7
2019	32.4
2020	33.7
2021	36.4
2022-2026	197.8
U.S. plans, Pension Benefits
Accumulated other comprehensive income (loss), before tax
Net loss	194.7	195.9
Net prior service cost	10.5	9.0
Defined Benefit Plan, Contributions
Plan contributions by employer	16.4	15.7
Estimated future employer contribution in next fiscal year	25.0
Expected benefits payments
2017	23.9
2018	24.9
2019	26.0
2020	27.1
2021	28.1
2022-2026	151.9
International Plans
Accumulated other comprehensive income (loss), before tax
Net loss	71.0	60.5
Net transition asset		(0.1)
Defined Benefit Plan, Contributions
Plan contributions by employer	9.8	8.4
Expected benefits payments
2017	6.7
2018	6.8
2019	6.4
2020	6.6
2021	8.3
2022-2026	45.9
Other Postretirement Benefits
Accumulated other comprehensive income (loss), before tax
Net loss	5.7	5.5
Net prior service cost	0.0	0.0
Net transition asset	0.0	$ 0.0
Expected to be amortized from Accumulated other comprehensive loss over next fiscal year
Net loss that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year	0.7
Prior service cost that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year	0.0
Net transition asset (obligation) that will be amortized from Accumulated other comprehensive loss into net periodic benefit cost over the next fiscal year	$ 0.0
Defined Benefit Plan, Assumed Health Care Cost Trend Rates
Health care cost trend rate assumed for next year (as a percent)	8.25%	8.50%
Health care cost trend rate (as a percent)	4.75%
Other Postretirement Benefits | Minimum
Expected benefits payments
Benefit payments per year, including amounts to be paid out of Company assets and reflecting future expected services, for the next ten years	$ 1.2
Other Postretirement Benefits | Maximum
Expected benefits payments
Benefit payments per year, including amounts to be paid out of Company assets and reflecting future expected services, for the next ten years	$ 1.4