Year Ended December 31,

2021

2020

2019

Basic earnings per share numerator:

Net income

$

529.0

$

468.2

$

370.8

Net loss attributable to noncontrolling interest

—

4.1

Net income excluding redeemable noncontrolling interest

529.0

468.2

374.9

Change in redemption value of redeemable noncontrolling interest

—

(0.5)

Net income allocated to participating securities

(1.7)

(1.2)

(1.7)

Net income allocated to common stockholders

$

527.3

$

467.0

$

372.7

Basic earnings per share denominator:

Weighted average shares outstanding

107.0

109.1

111.4

Basic earnings per share

$

4.93

$

4.28

$

3.35

Diluted earnings per share numerator:

Net income

$

529.0

$

468.2

$

370.8

Net loss attributable to redeemable noncontrolling interest

—

4.1

Net income excluding redeemable noncontrolling interest

529.0

468.2

374.9

Change in redemption value of redeemable noncontrolling interest

—

(0.5)

Net income allocated to participating securities

(1.7)

(1.2)

(1.7)

Net income allocated to common stockholders

$

527.3

$

467.0

$

372.7

Diluted earnings per share denominator:

Weighted average shares outstanding

107.0

109.1

111.4

Dilutive common shares issued under stock program

0.2

0.4

Total dilutive weighted average shares

107.2

109.3

111.8

Diluted earnings per share

$

4.92

$

4.27

$

3.34