Goodwill (Tables)

3 Months Ended

Mar. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amounts of Goodwill

The changes in the carrying amounts of goodwill during the three months ended March 31, 2024 (unaudited) were as follows:

(millions)	Commercial			Aviation			Total
Net book value as of December 31, 2023
Goodwill	$	388.1		$	216.0		$	604.1
Accumulated impairment losses		—			(59.5	)		(59.5	)
Total	$	388.1		$	156.5		$	544.6
Foreign currency translation		(0.1	)		(0.1	)		(0.2	)
Net book value as of March 31, 2024
Goodwill	$	388.0		$	215.9		$	603.9
Accumulated impairment losses		—			(59.5	)		(59.5	)
Total	$	388.0		$	156.4		$	544.4