Retirement and Other Postretirement Benefit Plans - Schedule of Pension Assets Measured at Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	$ 160.4	$ 165.6
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	132.9	120.6
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	21.9	39.3
Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	5.6	5.7	$ 6.5
Actual return on plan assets	0.4	0.2
Purchases,sales and settlements	0.1	(0.2)
Changes due to exchange rates	(0.6)	(0.8)
Equity Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	51.9	53.9
Equity Funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	51.9	53.9
Diversified Growth Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	44.2	45.8
Diversified Growth Funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	22.3	45.8
Diversified Growth Funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	21.9
Liability Driven Investments
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	35.9	38.7
Liability Driven Investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	35.9
Liability Driven Investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		38.7
Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	14.0	14.8
Debt Securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	14.0	14.8
Index Linked Gilts
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	8.4	6.1
Index Linked Gilts | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	8.4	6.1
Other Insurance Product Line
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	3.5	3.2
Other Insurance Product Line | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	3.5	3.2	3.6
Actual return on plan assets	0.3	0.1
Purchases,sales and settlements	0.3
Changes due to exchange rates	(0.3)	(0.5)
Diversified Investment, Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	2.1	2.5
Diversified Investment, Funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	2.1	2.5	$ 2.9
Actual return on plan assets	0.1	0.1
Purchases,sales and settlements	(0.2)	(0.2)
Changes due to exchange rates	(0.3)	(0.3)
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	0.4	0.6
Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements	$ 0.4
Cash and Cash Equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value measurements		$ 0.6