Stockholders' Equity and Earnings Per Common Share (Tables)

6 Months Ended

Jun. 30, 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 June 30				Six Months Ended June 30
	2018		2017		2018		2017
	(in millions of dollars, except share data)
Numerator
Net Income	$	285.5	$	245.1	$	559.0	$	475.0
Denominator (000s)
Weighted Average Common Shares - Basic	220,776.7		227,454.4		221,335.7		228,437.0
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	286.0		724.3		484.5		836.8
Weighted Average Common Shares - Assuming Dilution	221,062.7		228,178.7		221,820.2		229,273.8
Net Income Per Common Share
Basic	$	1.29	$	1.08	$	2.53	$	2.08
Assuming Dilution	$	1.29	$	1.07	$	2.52	$	2.07

Treasury Stock Transactions

Common Stock

During the second quarter of 2018, our board of directors authorized the repurchase of up to $750.0 million of Unum Group's outstanding common stock through November 24, 2019. This authorization replaced the previous authorization of $750.0 million that was scheduled to expire on November 25, 2018. The remaining repurchase amount under the new program was $650.0 million at June 30, 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 June 30				Six Months Ended June 30
	2018		2017		2018		2017
	(in millions)
Shares Repurchased	2.5		2.2		4.4		4.3
Cost of Shares Repurchased (1)	$	100.1	$	100.1	$	200.3	$	200.1

(1) Includes a de minimis amount of commissions for the three months ended June 30, 2018 and $0.1 million for the three months ended June 30, 2017. For the six months ended June 30, 2018 and 2017, these amounts included commissions of $0.2 million and $0.1 million, respectively.