Stockholders' Equity and Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 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 March 31
	2017		2016
	(in millions of dollars, except share data)
Numerator
Net Income	$	229.9	$	210.6
Denominator (000s)
Weighted Average Common Shares - Basic	229,429.6		239,619.4
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	949.2		311.0
Weighted Average Common Shares - Assuming Dilution	230,378.8		239,930.4
Net Income Per Common Share
Basic	$	1.00	$	0.88
Assuming Dilution	$	1.00	$	0.88

Treasury Stock Transactions

Common Stock

During the second quarter of 2016, our board of directors authorized the repurchase of up to $750.0 million of Unum Group's outstanding common stock through November 26, 2017. This authorization replaced the previous authorization of $750.0 million that was scheduled to expire on November 21, 2016. The remaining repurchase amount under the new program was $395.5 million at March 31, 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 March 31
	2017		2016
	(in millions)
Shares Repurchased	2.1		3.7
Cost of Shares Repurchased (1)	$	100.0	$	100.0

(1) Includes commissions of a de minimis amount for each of the three month periods ended March 31, 2017 and 2016.