Stockholders' Equity and Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2014

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
	2014		2013		2012
	(in millions of dollars, except share data)
Numerator
Net Income	$	413.4	$	858.1	$	894.4
Denominator (000s)
Weighted Average Common Shares - Basic	255,525.9		264,725.8		281,355.9
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	1,126.9		1,223.4		400.9
Weighted Average Common Shares - Assuming Dilution	256,652.8		265,949.2		281,756.8
Net Income Per Common Share
Basic	$	1.62	$	3.24	$	3.18
Assuming Dilution	$	1.61	$	3.23	$	3.17

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
	December 2013		July 2012		February 2011
	(in millions of dollars)
Authorized Repurchase Amount	$	750.0	$	750.0	$	1,000.0
Remaining Repurchase Amount at Year End 2014	$	429.5	$	—	$	—

The December 2013 share repurchase program has an expiration date of June 12, 2015.

Common stock repurchases, which are classified as treasury stock until otherwise retired, were as follows:

	Year Ended December 31
	2014		2013		2012
	(in millions of dollars)
Shares Repurchased	8.7		11.2		23.6
Cost of Shares Repurchased (1)	$	300.6	$	318.6	$	500.6

(1) Includes commissions of $0.1 million, $0.2 million, and $0.6 million for the years ended December 31, 2014, 2013, and 2012, respectively.