Derivative Instruments and Fair Value Accounting - Recurring Fair Value Measurement (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions		Jun. 30, 2023	Dec. 31, 2022
Level 1
Assets:
Cash equivalents		$ 65.2	$ 29.8
Restricted cash		204.9	214.7
Total assets		270.1	244.5
Level 2 | Other Assets [Member]
Assets:
Total assets		42.1	43.3
Level 2 | Accrued Liabilities [Member]
Liabilities
Total liabilities		17.7	21.6
Level 3
Assets:
Total assets		0.0	0.0
Liabilities
Total liabilities		0.0	0.0
Interest Rate Swap [Member] | Level 2 | Other Assets [Member]
Assets:
Interest rate hedge (1)	[1]	21.7	19.7
Foreign Exchange Contract [Member] | Level 2 | Other Assets [Member]
Assets:
Foreign currency hedge (1)	[1]	2.7	2.0
TILC Warehouse Back to Back Swap Agreements | Level 2 | Other Assets [Member] | Not Designated as Hedging Instrument
Assets:
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	[1]	17.7	21.6
TILC Back to Back Swap Agreements | Level 2 | Accrued Liabilities [Member] | Not Designated as Hedging Instrument
Liabilities
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value	[2]	$ 17.7	$ 21.6

[1] Included in other assets in our Consolidated Balance Sheets.

[2] Included in accrued liabilities in our Consolidated Balance Sheets.