Goodwill and Other Intangible Assets (Other Intangible Assets Associated with Acquisition) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 868	$ 452
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	4 years	3 years
Net Carrying Amount	$ 228	$ 47
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	6 years	5 years
Net Carrying Amount	$ 636	$ 400
General Finance Corporation | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	5 years
Net Carrying Amount	$ 177
General Finance Corporation | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	9 years
Net Carrying Amount	$ 243