Year Ended December 31,

(In millions, except per share amounts)

2021

2020

2019

Basic Net Earnings Per Common Share:

Numerator:

Net earnings

$

506.8

$

502.9

$

263.0

Distributed and allocated undistributed net earnings to unvested restricted stockholders

—

(0.2)

(0.5)

Net earnings available to common stockholders

$

506.8

$

502.7

$

262.5

Denominator:

Weighted average number of common shares outstanding - basic

150.9

155.2

154.3

Basic net earnings per common share:

Basic net earnings per common share

$

3.36

$

3.24

$

1.70

Diluted Net Earnings Per Common Share:

Numerator:

Net earnings available to common stockholders

$

506.8

$

502.7

$

262.5

Denominator:

Weighted average number of common shares outstanding - basic

150.9

155.2

154.3

Effect of dilutive stock shares and units

1.5

0.8

0.5

Weighted average number of common shares outstanding - diluted under two-class

152.4

156.0

154.8

Effect of unvested restricted stock - participating security

—

0.4

Weighted average number of common shares outstanding - diluted under treasury stock

152.4

156.0

155.2

Diluted net earnings per common share

$

3.32

$

3.22

$

1.69