Stockholders' Equity and Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2021

Stockholders' Equity and Earnings Per Common Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

Net income per common share is determined as follows:

	Year Ended December 31
	2021		2020		2019
	(in millions of dollars, except share data)
Numerator
Net Income	$	824.2	$	793.0	$	1,100.3
Denominator (000s)
Weighted Average Common Shares - Basic	204,232.9		203,642.0		209,728.9
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	615.0		113.3		125.5
Weighted Average Common Shares - Assuming Dilution	204,847.9		203,755.3		209,854.4
Net Income Per Common Share
Basic	$	4.04	$	3.89	$	5.25
Assuming Dilution	$	4.02	$	3.89	$	5.24

Treasury Stock Transactions

Our board of directors has authorized the repurchase of Unum Group's common stock under the following repurchase programs:

	Share Repurchase Program Authorized During
	October 2021		May 2019
	(in millions of dollars)
Authorized Repurchase Amount	$	250.0	$	750.0
Remaining Repurchase Amount at Year End 2021	200.0		—

The October 2021 share repurchase program has an expiration date of December 31, 2022.

Common stock repurchases, which are accounted for using the cost method and classified as treasury stock until otherwise retired, were as follows:

	Year Ended December 31
	2021		2020		2019
	(in millions)
Shares Repurchased	1.9		—		12.3
Cost of Shares Repurchased1	$	50.0	$	—	$	400.4

1 Includes commissions of $0.4 million for the year ended December 31, 2019.