Pension Plans and Other Retirement Plans (Details 4) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Plans
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	$ 980.9	$ 890.6	$ 1,131.3
Other Foreign Member [Member] | Pension Plans
Pension plans and other postretirement benefit plans
Defined Benefit Plan Percentage of Certain Specified foreign Plan Assets to Total Foreign Plan Assets	4.00%	4.00%
Foreign Plan [Member] | Pension Plans
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	$ 25.2	$ 19.5	21.5
Percentage of foreign plan assets to global pension assets	3.00%	2.00%
Expected return on plan assets	4.43%	4.69%
Plan contributions and funding
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 9.0
Foreign Plan [Member] | Pension Plans | Corporate bonds
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.4	$ 0.4
Foreign Plan [Member] | Pension Plans | Insurance contracts and other investments
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.5	0.4
Foreign Plan [Member] | Pension Plans | Cash
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.1	0.1
Foreign Plan [Member] | Pension Plans | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	1.0	0.9
Foreign Plan [Member] | Pension Plans | Fair Value, Inputs, Level 2 [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.9	0.8
Foreign Plan [Member] | Pension Plans | Fair Value, Inputs, Level 2 [Member] | Corporate bonds
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.4	0.4
Foreign Plan [Member] | Pension Plans | Fair Value, Inputs, Level 2 [Member] | Insurance contracts and other investments
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.5	0.4
Foreign Plan [Member] | Pension Plans | Fair Value, Inputs, Level 1 [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.1	0.1
Foreign Plan [Member] | Pension Plans | Fair Value, Inputs, Level 1 [Member] | Cash
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	0.1	0.1
Foreign Plan [Member] | Pension Plans | Fair Value Measured at Net Asset Value Per Share [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	$ 24.2	$ 18.6
Canada | Pension Plans
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Percentage of Plan Assets	100.00%	100.00%
Defined Benefit Plan Percentage of Certain Specified foreign Plan Assets to Total Foreign Plan Assets	96.00%	96.00%
Expected return on plan assets	4.50%
Canada | Pension Plans | Defined Benefit Plan, Equity Securities [Member]
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	23.00%
Percentage of Plan Assets	25.00%	28.00%
Canada | Pension Plans | Other Investment [Member]
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	12.00%
Percentage of Plan Assets	13.00%	14.00%
Canada | Pension Plans | Bonds
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	65.00%
Percentage of Plan Assets	62.00%	58.00%
UNITED STATES
Plan contributions and funding
Defined Benefit Plan, Mandatory Future Employer Contributions, Next Fiscal Year	$ 0.5
UNITED STATES | Pension Plans
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Percentage of Plan Assets	100.00%	100.00%
Assets Measured at Fair value	$ 955.7	$ 871.1	$ 1,109.8
Expected return on plan assets	5.75%	5.25%
UNITED STATES | Pension Plans | Defined Benefit Plan, Equity Securities [Member]
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	22.00%
Percentage of Plan Assets	22.00%	14.00%
UNITED STATES | Pension Plans | Multi-asset credit [Member]
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	3.00%
Percentage of Plan Assets	3.00%	2.00%
UNITED STATES | Pension Plans | Liability-hedging assets [Member]
Pension plans and other postretirement benefit plans
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	75.00%
Percentage of Plan Assets	75.00%	84.00%
UNITED STATES | Pension Plans | Defined Benefit Plan, Common Collective Trust [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	$ 8.0	$ 10.5
UNITED STATES | Pension Plans | Annuity and immediate participation contracts
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	20.5	19.8
UNITED STATES | Pension Plans | Fair Value, Inputs, Level 1, 2 and 3 [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	28.5	30.3
UNITED STATES | Pension Plans | Fair Value, Inputs, Level 2 [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	28.5	30.3
UNITED STATES | Pension Plans | Fair Value, Inputs, Level 2 [Member] | Defined Benefit Plan, Common Collective Trust [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	8.0	10.5
UNITED STATES | Pension Plans | Fair Value, Inputs, Level 2 [Member] | Annuity and immediate participation contracts
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	20.5	19.8
UNITED STATES | Pension Plans | Fair Value Measured at Net Asset Value Per Share [Member]
Pension plans and other postretirement benefit plans
Assets Measured at Fair value	$ 927.2	$ 840.8