Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2019

Share-based Payment Arrangement [Abstract]

Summary of Performance Share Activity

The following is a summary of performance share activity under the 2014 Plan:

	Shares	Weighted-Average Grant Date Fair Value
Unvested performance shares outstanding at December 31, 2016	551,985	$	15.22
Granted	466,923	18.61
Forfeited	(34,073)	16.28
Unvested performance shares outstanding at December 31, 2017	984,835	16.80
Granted	532,740	19.78
Forfeited	(62,124)	17.82
Vested	(2,079)	16.70
Unvested performance shares outstanding at December 31, 2018	1,453,372	17.85
Granted	637,118	17.84
Forfeited	(80,319)	18.66
Vested	(505,755)	15.23
Unvested performance shares outstanding at December 31, 2019	1,504,416	$	18.68

Stock Option Incentive Plan

The following is a summary of stock option activity under the Incentive Plans and the SOP:

	Shares Subject To Option	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value (1) (in millions)
Options outstanding at December 31, 2016	16,555,925	$	14.84
Granted	2,261,586	19.14
Forfeited	(459,576)	17.87
Exercised	(3,920,294)	15.97
Options outstanding at December 31, 2017	14,437,641	15.11
Granted	2,450,861	19.61
Forfeited	(294,474)	17.87
Exercised	(1,916,961)	14.55
Options outstanding at December 31, 2018	14,677,067	15.87
Granted	2,807,692	17.62
Forfeited	(652,965)	18.28
Exercised	(1,632,971)	14.77
Options outstanding at December 31, 2019	15,198,823	$	16.20	6.2	$	22.7
Options exercisable at December 31, 2019	10,551,014	$	15.21	5.2	$	22.7

(1)Reflects only those stock options with intrinsic value at December 31, 2019.

Options Outstanding and Options Exercisable

Additional information concerning options outstanding and options exercisable at December 31, 2019 is summarized as follows:

Exercise Price Range	Options Outstanding				Options Exercisable
		Weighted-Average
	Number	Remaining Life (in years)	Exercise Price		Number	Weighted-Average Exercise Price
$11.53 — $14.54	3,531,960	3.4	$	13.53	3,525,520	$	13.53
14.55 — 14.88	4,970,387	5.0	14.73		4,970,387	14.73
14.89 — 18.40	2,689,105	9.0	17.60		57,997	16.47
18.41 — 19.71	4,007,371	7.6	19.45		1,997,110	19.36

Restricted Stock Award Incentive Plan

The following is a summary of restricted stock award activity under the Incentive Plans and the RRP:

	Shares	Weighted-Average Grant Date Fair Value
Unvested restricted shares outstanding at December 31, 2016	886,082	$	14.59
Granted	303,090	18.84
Forfeited	(31,828)	15.56
Vested	(485,023)	14.49
Unvested restricted shares outstanding at December 31, 2017	672,321	16.53
Granted	489,789	18.50
Forfeited	(29,426)	17.81
Vested	(402,134)	16.04
Unvested restricted shares outstanding at December 31, 2018	730,550	18.03
Granted	383,420	17.44
Forfeited	(68,091)	17.11
Vested	(347,078)	17.49
Unvested restricted shares outstanding at December 31, 2019	698,801	$	18.07