Capital Stock and Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2020

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)	2020		2019		2018
Numerator:
Net earnings	$	342.0	$	436.5	$	385.5
Denominator:
Basic weighted average common shares outstanding	168.4		168.4		168.4
Effect of dilutive stock options and RSUs	1.0		—		—
Diluted weighted average common shares outstanding	169.4		168.4		168.4
Earnings per share:
Basic	$	2.03	$	2.59	$	2.29
Diluted	$	2.02	$	2.59	$	2.29
Anti-dilutive shares	2.7		—		—