Summary of Financial Services Lease Revenues by Lease Type (Detail) - Financial Services - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Entity Wide Information Revenue From External Customer [Line Items]
Finance lease revenues	$ 72.7	$ 46.6	$ 194.1	$ 134.5
Operating lease revenues	180.6	192.4	564.1	595.7
Total lease revenues	$ 253.3	$ 239.0	$ 758.2	$ 730.2