Schedule of Fair Values of Pension Plan Assets by Asset Category (Details) - USD ($) $ in Millions		Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 66.2	$ 101.8
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.4	1.9
Equity Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	16.8	35.0
Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			1.8
Bond Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	6.4	17.5
Global Multi-Strategy Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	19.4	19.5
Government Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	19.1	22.4
Pension Plan Investments, Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	4.1	3.7
Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1.7	3.2
Fair Value, Inputs, Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.4	1.9
Fair Value, Inputs, Level 1 | Equity Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	0.9	1.1
Fair Value, Inputs, Level 1 | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			0.0
Fair Value, Inputs, Level 1 | Bond Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	0.0	0.0
Fair Value, Inputs, Level 1 | Global Multi-Strategy Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	0.0	0.0
Fair Value, Inputs, Level 1 | Government Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	0.1	0.0
Fair Value, Inputs, Level 1 | Pension Plan Investments, Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	0.3	0.2
Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		64.5	98.6
Fair Value, Inputs, Level 2 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		0.0	0.0
Fair Value, Inputs, Level 2 | Equity Securities - Mutual Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[1]	15.9	33.9
Fair Value, Inputs, Level 2 | Money Market Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets			1.8
Fair Value, Inputs, Level 2 | Bond Funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[2]	6.4	17.5
Fair Value, Inputs, Level 2 | Global Multi-Strategy Fund
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[3]	19.4	19.5
Fair Value, Inputs, Level 2 | Government Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[4]	19.0	22.4
Fair Value, Inputs, Level 2 | Pension Plan Investments, Other
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	[5]	$ 3.8	$ 3.5

[1] The equity securities represent mutual funds held primarily by the pension plans in the United Kingdom (U.K.) and Canada, which include both domestic and international equity securities as of December 31, 2014. Due to the termination of the Canada pension plan in the second quarter of 2015, remaining equity securities represent mutual funds held primarily by the pension plans in the U.K. as of December 31, 2015. Mutual funds are valued at quoted market prices, which represent the net asset values of shares held by the plans as of December 31, 2015 and December 31, 2014.

[2] The bond funds principally consisted of corporate and municipal or local government bonds for the pension plans in Canada and the U.K. as of December 31, 2014. Due to the termination of the Canada pension plan in the second quarter of 2015, remaining bond funds consist primarily of corporate bonds for pension plans in the U.K. as of December 31, 2015.

[3] The global multi-strategy fund, which was purchased during 2014 for the pension plans in the U.K., represents a series of multiple asset diversified funds invested in equities, bonds and other investments. The global multi-strategy fund is valued at the net asset value per unit multiplied by the number of units held as of the measurement date.

[4] Government fixed income securities held by pension plans in the U.K. are valued at the net asset value per share multiplied by the number of shares held as of the measurement date.

[5] Other category includes other investments for pension plans in the international subsidiaries.