Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Supplemental Cash Flow Information [Abstract]
Cash and cash equivalents	$ 65.5		$ 58.6
Restricted cash included in Other Current Assets	54.7		25.3
Restricted cash included in Other Assets	5.7		1.9
Total cash, cash equivalents, and restricted cash	125.9	$ 129.4	$ 85.8	$ 103.4
Accrued purchases of property and equipment	17.5	19.8
Adjustments to right-of-use assets including right-of-use assets obtained in exchange for new operating lease liabilities	(3.0)	84.0
Adjustments to right-of-use assets including right-of-use assets obtained in exchange for new finance lease liabilities	39.0	8.9
Interest payments, net of amounts capitalized and including interest on vehicle inventory financing	93.0	83.1
Net income tax payments (refunds)	$ (0.7)	$ 0.7