Earnings Per Share

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Earnings Per Share

EARNINGS PER SHARE

Basic and diluted earnings per common share were calculated as follows:

	Year Ended December 31
(in millions, except per share amounts)	2021		2020		2019
Net earnings	$	544	$	696	$	549
Weighted-average common shares outstanding	40.3		40.6		41.4
Net effect of dilutive stock options and awards	—		—		—
Dilutive weighted-average common shares outstanding	40.3		40.6		41.4
Earnings per share - basic	$	13.50	$	17.14	$	13.26
Earnings per share - diluted	$	13.50	$	17.14	$	13.26

The Company's calculation of diluted earnings per common share includes the dilutive effects of the assumed exercise of stock options and vesting of restricted stock based on the treasury stock method. Under the treasury stock method, the Company has excluded from the diluted share amounts presented above the effects of 0.4 million Restricted Performance Stock Rights ("RPSRs") for the year ended December 31, 2021, and 0.3 million RPSRs for each of the years ended December 31, 2020 and 2019.