Goodwill and Intangible Assets, Net - Narrative (Details) - USD ($) $ in Millions		1 Months Ended	2 Months Ended	3 Months Ended			12 Months Ended
	Oct. 01, 2024	Oct. 31, 2025	Nov. 30, 2025	Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2025	Dec. 31, 2023
Goodwill and Intangible Assets
Owned real estate			$ 465
Impairment				$ 2	$ 0		$ 40	$ 7
Goodwill				290	288		290
Automotive Segment
Goodwill and Intangible Assets
Impairment of goodwill	$ 0		0			$ 0
Impairment of Long-Lived Assets Held-for-use		$ 23
Impairment			$ 2	2
Goodwill				$ 250	$ 250		$ 250