Stockholders' Equity and Earnings Per Common Share (Tables)

9 Months Ended

Sep. 30, 2017

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 September 30				Nine Months Ended September 30
	2017		2016		2017		2016
	(in millions of dollars, except share data)
Numerator
Net Income	$	252.3	$	236.0	$	727.3	$	683.4
Denominator (000s)
Weighted Average Common Shares - Basic	225,288.1		233,752.0		227,375.5		236,744.3
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	741.7		461.5		805.0		399.5
Weighted Average Common Shares - Assuming Dilution	226,029.8		234,213.5		228,180.5		237,143.8
Net Income Per Common Share
Basic	$	1.12	$	1.01	$	3.20	$	2.89
Assuming Dilution	$	1.12	$	1.01	$	3.19	$	2.88

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 $612.8 million at September 30, 2017.

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 September 30				Nine Months Ended September 30
	2017		2016		2017		2016
	(in millions)
Shares Repurchased	2.0		2.9		6.3		9.4
Cost of Shares Repurchased (1)	$	100.2	$	100.2	$	300.3	$	300.3

(1) Includes commissions of $0.1 million for the three month periods ended September 30, 2017 and 2016, and $0.2 million for the nine month periods ended September 30, 2017 and 2016.