Goodwill (Tables)

6 Months Ended

Jun. 30, 2022

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amounts of Goodwill

There were no changes in the carrying amount of goodwill during the six months ended June 30, 2022 (unaudited). The balances for each segment were as follows:

(millions)	Commercial		Aviation			Total
Net book value as of June 30, 2022 and December 31, 2021
Goodwill	$	377.1	$	209.0		$	586.1
Accumulated impairment losses		—		(59.5	)		(59.5	)
Total	$	377.1	$	149.5		$	526.6