Stockholders' Equity and Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2018

Stockholders' Equity and Earnings Per Common Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

Earnings Per Common Share

Net income per common share is determined as follows:



	Three Months Ended March 31
	2018		2017
	(in millions of dollars, except share data)
Numerator
Net Income	$	273.5	$	229.9

Denominator (000s)
Weighted Average Common Shares - Basic	221,894.0		229,429.6
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	683.0		949.2
Weighted Average Common Shares - Assuming Dilution	222,577.0		230,378.8

Net Income Per Common Share
Basic	$	1.23	$	1.00
Assuming Dilution	$	1.23	$	1.00

Treasury Stock Transactions

Common Stock

During the second quarter of 2017, our board of directors authorized the repurchase of up to $750.0 million of Unum Group's outstanding common stock through November 25, 2018. This authorization replaced the previous authorization of $750.0 million that was scheduled to expire on November 26, 2017. The remaining repurchase amount under the new program was $412.8 million at March 31, 2018.

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



	Three Months Ended March 31
	2018		2017
	(in millions)
Shares Repurchased	1.9		2.1
Cost of Shares Repurchased¹	$	100.2	$	100.0

¹ Includes commissions of $0.2 million for the three months ended March 31, 2018, and a de minimis amount for the three months ended March 31, 2017.