Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2022

Earnings Per Share [Abstract]

Schedule of Reconciliation of Basic and Diluted Earnings Per Share Computations

The following table provides a reconciliation of basic and diluted earnings per share computations for the three and six months ended June 30, 2022 and 2021:

	Three Months Ended June 30,				Six Months Ended June 30,
(Millions of dollars, except share and per share amounts)	2022		2021		2022		2021
Earnings per common share:
Net income per share - basic
Net income attributable to common stockholders	$	183.3	$	128.8	$	335.7	$	184.1
Weighted average common shares outstanding (in thousands)	23,952		26,579		24,302		27,002
Earnings per common share	$	7.65	$	4.85	$	13.81	$	6.82

 

Earnings per common share - assuming dilution:
Net income per share - diluted
Net income attributable to common stockholders	$	183.3	$	128.8	$	335.7	$	184.1
Weighted average common shares outstanding (in thousands)	23,952		26,579		24,302		27,002
Common equivalent shares:
Dilutive share-based awards	389		338		406		349
Weighted average common shares outstanding - assuming dilution (in thousands)	24,341		26,917		24,708		27,351
Earnings per common share assuming dilution	$	7.53	$	4.79	$	13.59	$	6.73

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

We have excluded from the earnings-per-share calculation certain stock options and shares that are considered to be anti-dilutive under the treasury stock method and are reported in the table below.

	Three Months Ended June 30,		Six Months Ended June 30,
Potentially dilutive shares excluded from the calculation as their inclusion would be anti-dilutive	2022	2021	2022	2021
Stock Options	3,250	84,600	55,150	84,600
PSUs	17,043	21,628	17,043	21,628
Total anti-dilutive shares	20,293	106,228	72,193	106,228