Leases - Schedule of Operating Lease Income (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Leases [Abstract]
Lease income – Operating leases	$ 214.0	$ 195.0
Variable lease income – Operating leases	19.0	13.0
Rental income on operating leases	233.0	208.0
Interest income - Sales type and direct financing leases	41.0	42.0
Variable lease income included in Other noninterest income	15.0	11.0
Interest income - Leveraged leases	5.0	5.0
Total lease income	294.0	$ 266.0
Property tax reimbursement due from customer	4.0		$ 3.0
Variable lease, income related to insurance coverage	$ 10.0		$ 7.0