CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 165.0	$ 229.6
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	(16.2)	13.1
Unrealized loss on debt securities, net of tax benefit of $0.1 and $0.0	(0.2)	0.0
Total other comprehensive (loss) income, net of tax	(16.4)	13.1
Comprehensive income	148.6	242.7
Comprehensive income attributable to non-controlling interest	(1.5)	(0.7)
Comprehensive income attributable to redeemable non-controlling interest	(0.9)	(0.2)
Comprehensive income attributable to Lithia Motors, Inc.	$ 146.2	$ 241.8