Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2019

Stock-Based Compensation Plans [Abstract]

Stock-Based Award Plan Activity

A summary of the Company’s stock option (including SARs) activity for the year ended December 31, 2019 is presented in the following table (underlying shares in thousands).

Stock-Based Compensation Awards
	Shares			Weighted-Average Exercise Price (per share)		Wtd. Avg. Remaining Contractual Term (years)		Aggregate Intrisic Value of In-The-Money Options (in millions)
Outstanding at December 31, 2018		12,352		$	10.93
Granted		1,141		$	27.45
Excercised or Settled		(5,222	)	$	8.83
Forfeited		(226	)	$	27.46
Expired		(17	)	$	31.61
Outstanding at December 31, 2019		8,028		$	14.14		5.9	$	179.8
Vested at December 31, 2019		6,075		$	9.93		5.0	$	161.4

Assumptions Used to Estimate Fair Value of Options Granted

The following assumptions were used to estimate the fair value of options and SARs granted during the years ended December 31, 2019, 2018 and 2017.

	2019			2018			2017
Assumptions:
Expected life of options (in years)		6.3			7.0 - 7.5			5.0 - 6.3
Risk-free interest rate		1.7% - 2.6	%		2.9% - 3.1	%		1.9% - 2.1	%
Assumed volatility		24.8%-31.8	%		31.1%-35.4	%		41.2% -45.8	%
Expected dividend rate		0.0	%		0.0	%		0.0	%

Restricted Stock Unit Activity

A summary of the Company’s restricted stock unit activity for the year ended December 31, 2019 is presented in the following table (underlying shares in thousands).

	Shares			Weighted-Average Grant-Date Fair Value
Non-vested as of December 31, 2018		362		$	31.78
Granted		476		$	27.82
Vested		(48	)	$	30.88
Forfeited		(71	)	$	30.51
Non-vested as of December 31, 2019		719		$	29.31