The following table shows the calculation of basic and diluted net earnings per common share under the two-class method:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
(In millions, except per share amounts)	2016			2015			2016			2015
Basic Net Earnings Per Common Share:
Numerator
Net earnings available to common stockholders	$	163.3		$	86.6		$	315.3		$	211.9
Distributed and allocated undistributed net loss to non-vested restricted stockholders		(1.2	)		(0.6	)		(2.2	)		(1.5	)
Distributed and allocated undistributed net earnings to common stockholders		162.1			86.0			313.1			210.4
Distributed net earnings - dividends paid to common stockholders		(31.3	)		(26.1	)		(88.0	)		(80.6	)
Allocation of undistributed net earnings to common stockholders	$	130.8		$	59.9		$	225.1		$	129.8
Denominator
Weighted average number of common shares outstanding - basic		194.1			202.9			195.0			206.7
Basic net earnings per common share:
Distributed net earnings to common stockholders	$	0.16		$	0.13		$	0.45		$	0.39
Allocated undistributed net earnings to common stockholders		0.68			0.30			1.15			0.63
Basic net earnings per common share:⁽¹⁾	$	0.84		$	0.43		$	1.60		$	1.02
Diluted Net Earnings Per Common Share:
Numerator
Distributed and allocated undistributed net earnings to common stockholders	$	162.1		$	86.0		$	313.1		$	210.4
Add: Allocated undistributed net earnings to unvested restricted stockholders		1.1			0.5			1.7			1.0
Less: Undistributed net earnings (loss) reallocated to non-vested restricted stockholders		(1.1	)		(0.5	)		(1.7	)		(1.0	)
Net earnings available to common stockholders - diluted	$	162.1		$	86.0		$	313.1		$	210.4
Denominator
Weighted average number of common shares outstanding - basic		194.1			202.9			195.0			206.7
Effect of contingently issuable shares		1.0			1.4			0.9			1.3
Effect of unvested restricted stock units		0.9			0.7			0.9			0.7
Weighted average number of common shares outstanding - diluted under two-class		196.0			205.0			196.8			208.7
Effect of unvested restricted stock - participating security		0.7			0.8			0.7			0.8
Weighted average number of common shares outstanding - diluted under treasury stock		196.7			205.8			197.5			209.5
Diluted net earnings per common share⁽¹⁾	$	0.83		$	0.42		$	1.59		$	1.01

⁽¹⁾

The Company early adopted ASU 2016-09 on a prospective basis, related to the recognition of excess tax benefits to the income statement which were previously recorded in additional paid-in capital, effective January 1, 2016. This resulted in an additional 377,130 and 370,090 diluted weighted average number of common shares outstanding for the three and nine months ended September 30, 2016, respectively, and recognition of excess tax benefits of $1.8 million and $12.4 million in income tax provision for the three and nine months ended September 30, 2016, respectively. As a result, net earnings per common share increased by $0.01 per share and $0.06 per share for the three and nine months ended September 30, 2016, respectively. Refer to Note 2, “Recently Issued Accounting Standards” of the notes to the condensed consolidated financial statements for further details.