Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of Capital Stock

Information regarding the Company’s capital stock at December 31 follows:

	Shares Authorized		Shares Issued
	2020	2019	2020	2019
$25 par, 4% noncumulative, preferred stock	840,000	840,000	649,736	649,736
$1 par, preferred stock	2,000,000	2,000,000	—	—
$0.01 par, common stock	400,000,000	400,000,000	123,352,185	123,352,185

Shares outstanding at December 31:

	2020	2019
$25 par, 4% noncumulative, preferred stock	215,199	222,625
$0.01 par, common stock	91,047,107	96,115,669

Schedule of Terms of Accelerated Share Repurchase Agreements

During 2019 and 2020, the Company entered into ASR agreements under the 2019 Program. The terms of the agreements, structured as outlined above, were as follows:

Third Party Institution	Agreement Date	Settlement Date	Total Amount of Agreement (in millions)		Initial Shares Delivered	Fair Market Value of Initial Shares (in millions)		Additional Shares Delivered	Fair Market Value of Additional Shares (in millions)		Total Shares Delivered	Weighted-Average Price Per Share
ASR Agreement #1	November 2019	March 2020	$	275.0	1,511,380	$	233.75	224,244	$	41.25	1,735,624	$	158.44
ASR Agreement #2	November 2019	March 2020	$	275.0	1,511,380	$	233.75	221,692	$	41.25	1,733,072	$	158.68
Total			$	550.0	3,022,760	$	467.5	445,936	$	82.5	3,468,696	$	154.66
ASR Agreement #3	October 2020	January 2021	$	250.0	1,187,084	$	212.50	116,314	$	37.50	1,303,398	$	191.81
ASR Agreement #4	October 2020	January 2021	$	250.0	1,187,084	$	212.50	117,088	$	37.50	1,304,172	$	191.69
Total			$	500.0	2,374,168	$	425.0	233,402	$	75.0	2,607,570	$	191.75

Schedule of Treasury Stock

Shares of common stock in treasury and related activity follow:

	2020	2019	2018
Balance at beginning of year	27,236,516	22,455,507	20,315,380
Shares repurchased	5,350,976	5,076,530	2,272,213
Shares issued to fund stock option exercises	(133,951)	(109,560)	(24,024)
Employee stock purchase plan shares issued	(51,658)	(72,707)	(62,866)
Nonvested shares issued	(111,003)	(124,031)	(51,191)
Nonvested shares forfeited	14,198	10,777	5,995
Balance at end of year	32,305,078	27,236,516	22,455,507

Schedule of Cash Dividends Declared per Common Share

The following table presents the amount of cash dividends declared per common share by the Company’s Board of Directors:

	2020		2019		2018
Cash dividends declared per common share	$	1.64	$	1.48	$	1.44