Stockholders' Equity and Earnings Per Common Share (Tables)

3 Months Ended

Mar. 31, 2016

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
	2016		2015
	(in millions of dollars, except share data)
Numerator
Net Income	$	210.6	$	212.9
Denominator (000s)
Weighted Average Common Shares - Basic	239,619.4		251,467.4
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	311.0		767.5
Weighted Average Common Shares - Assuming Dilution	239,930.4		252,234.9
Net Income Per Common Share
Basic	$	0.88	$	0.85
Assuming Dilution	$	0.88	$	0.84

Treasury Stock Transactions

Common Stock

During the second quarter of 2015, our board of directors authorized the repurchase of up to $750.0 million of Unum Group's outstanding common stock through November 21, 2016. This authorization replaced the previous authorization of $750.0 million that was scheduled to expire on June 12, 2015. The remaining repurchase amount under the new program was $402.3 million at March 31, 2016.

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
	2016		2015
	(in millions)
Shares Repurchased	3.7		3.2
Cost of Shares Repurchased (1)	$	100.0	$	108.1

(1) Includes commissions of a de minimis amount and $0.1 million for each of the three month periods ended March 31, 2016 and 2015, respectively.