Capital Stock and Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share

Information related to the calculation of net earnings per share of common stock is summarized as follows:

	Year Ended December 31
($ and shares in millions, except per share amounts)	2022		2021		2020
Numerator:
Net earnings	$	401.3	$	413.0	$	342.0
Denominator:
Basic weighted average common shares outstanding	160.5		169.0		168.4
Effect of dilutive stock options and RSUs	0.5		1.1		1.0
Diluted weighted average common shares outstanding	161.0		170.1		169.4
Earnings per share:
Basic	$	2.50	$	2.44	$	2.03
Diluted	$	2.49	$	2.43	$	2.02
Anti-dilutive shares	3.3		2.5		2.7