Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following tables summarize the bases used to measure financial assets and liabilities that are carried at fair value on a recurring basis in the consolidated balance sheets.

			Basis of fair value measurement
	Balance as of December 31, 2016		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets
Foreign exchange forward contracts	$	1.7	$	—	$	1.7	$	—
Available-for-sale securities		328.7		—		328.7		—
Total assets	$	330.4	$	—	$	330.4	$	—
Liabilities
Foreign exchange forward contracts	1.5			—	1.5			—
Total liabilities	$	1.5	$	—	$	1.5	$	—

			Basis of fair value measurement
	Balance as of December 31, 2015		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Assets
Foreign exchange forward contracts	$	1.8	$	—	$	1.8	$	—
Interest rate swap	0.4			—	0.4			—
Total assets	$	2.2	$	—	$	2.2	$	—
Liabilities
Foreign exchange forward contracts	1.5			—	1.5			—
Total liabilities	$	1.5	$	—	$	1.5	$	—

Assets Measured at Fair Value on a Nonrecurring Basis

The fair value as of the measurement date, net book value as of the end of the year and related impairment charge for assets measured at fair value on a nonrecurring basis subsequent to initial recognition during the years ended December 31, 2016, 2015 and 2014 were as follows:

	Year Ended December 31, 2016				As of December 31, 2016
	Impairment Charge		Fair Value Measurement (Level 3)		Net Book Value
Long-lived assets held for sale or disposal	$	0.6	$	—	$	—
Goodwill		527.8		15.2		15.2
Other intangible assets		29.7		4.6		4.3
Total	$	558.1	$	19.8	$	19.5

	Year Ended December 31, 2015				As of December 31, 2015
	Impairment Charge		Fair Value Measurement (Level 3)		Net Book Value
Long-lived assets held and used	$	0.3	$	—	$	—
Long-lived assets held for sale or disposal		1.5		2.8		—
Goodwill		18.0		—		—
Other intangible assets		11.9		—		—
Total	$	31.7	$	2.8	$	—

	Year Ended December 31, 2014				As of December 31, 2014
	Impairment Charge		Fair Value Measurement (Level 3)		Net Book Value
Long-lived assets held and used	$	5.2	$	0.6	$	0.7
Long-lived assets held for sale or disposal		8.7		9.2		2.0
Other intangible assets		13.2		—		—
Total	$	27.1	$	9.8	$	2.7

Fair Values, Valuation Techniques and Related Unobservable Inputs of Level Three

The following table presents the fair value, valuation techniques and related unobservable inputs for these Level 3 measurements for the years ended December 31, 2016, 2015 and 2014:

	Fair Value		Valuation Technique	Unobservable Input	Range
2016
Customer relationships	$	4.6	Excess earnings	Attrition rate		5.0%
				Discount Rate		13.0%
2015
Customer relationships	$	—	Excess earnings	Attrition rate		2.7%
2014
Customer relationships	$	—	Excess Earnings	Discount rate	12.0 - 18.0%
				Attrition Rate	6.6% - 12.0%