Equity Incentive Program (Tables)

12 Months Ended

Dec. 31, 2016

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-Based Compensation Recognized Period Costs

The following table summarizes the compensation expense recognized by the Company for the periods presented:



	Years Ended December 31,
(in millions)	2016		2015		2014
Pre-tax stock-based compensation expense	$	21.5	$	15.2	$	8.6
Tax benefit	—		—		(3.0		)
Total stock-based compensation expense, net of tax	$	21.5	$	15.2	$	5.6

Schedule of Black-Scholes Option-Pricing Assumptions

The fair value of stock options granted by the Company subsequent to the Separation and our Former Parent's SSARs and stock options granted to Knowles employees prior to the Separation was estimated on the date of grant using a Black-Scholes option-pricing model based on the assumptions shown in the table below.



	Knowles Grants
	2016			2015			2014
Risk-free interest rate	1.04%	to	1.25%	1.24%	to	1.50%	1.32%	to	1.70%
Dividend yield	—%			—%			—%
Expected life (years)	4.5			4.5			4.5	to	5.3
Volatility	37.0%	to	39.6%	39.8%	to	42.4%	42.9%	to	49.9%
Fair value at date of grant	$3.76	to	$4.83	$5.94	to	$6.88	$7.99	to	$13.50

Schedule of SSAR and Stock Options Activity

The following table summarizes the Company's SSAR and stock option activity for the year ended December 31, 2016 (in millions except share and per share amounts).



	SSARs							Stock Options
	Number of Shares		Weighted-Average Exercise Price		Aggregate Intrinsic Value		Weighted-Average Remaining Contractual Term (Years)	Number of Shares		Weighted-Average Exercise Price		Aggregate Intrinsic Value		Weighted-Average Remaining Contractual Term (Years)
(in millions except share and per share amounts)
Outstanding at December 31, 2015	1,013,780		$	20.92				3,165,556		$	22.58
Granted	—		—					2,038,013		11.20
Exercised	(56,707	)	14.50					—		—
Forfeited	—		—					(410,959	)	18.15
Expired	(58,355	)	$	22.06				(108,493	)	$	22.22
Outstanding at December 31, 2016	898,718		$	21.25	$	0.5	4.9	4,684,117		$	18.03	$	10.4	5.5

Exercisable at December 31, 2016	898,718		$	21.25	$	0.5	4.9	938,890		$	22.67	$	—	5.0

Schedule of Other Share-based Compensation, Activity

Other information regarding the exercise of SSARs and stock options is listed below:



	Years Ended December 31,
(in millions)	2016		2015		2014
SSARs
Fair value of SSARs that are exercisable	$	1.9	$	0.6	$	1.1
Aggregate intrinsic value of SSARs exercised	$	0.1	$	0.1	$	0.1

Stock Options
Cash received by Knowles for exercise of stock options	$	—	$	—	$	0.1
Aggregate intrinsic value of options exercised	$	—	$	—	$	0.2

Schedule of Restricted Stock Units Award Activity

The following table summarizes the Company's RSU balances for the year ended December 31, 2016:



	Share units		Weighted-average grant date fair value
Unvested at December 31, 2015	1,079,994		$	24.41
Granted	1,685,512		12.17
Vested	(415,905	)	19.81
Forfeited	(274,603	)	15.81
Unvested at December 31, 2016	2,074,998		$	14.94