Goodwill and Other Intangible Assets (Other Intangible Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Total	$ 615	$ 648
Amortization expense	233	250	$ 290
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2022	205
2023	156
2024	109
2025	78
2026	44
Thereafter	23
Total	$ 615	$ 648
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	51 months	35 months
Gross Carrying Amount	$ 65	$ 12
Accumulated Amortization	13	6
Total	52	6
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	$ 52	$ 6
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	5 years	6 years
Gross Carrying Amount	$ 2,389	$ 2,252
Accumulated Amortization	1,835	1,614
Total	554	638
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	$ 554	$ 638
Customer relationships | General Finance Corporation
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	6 years
Total	$ 74
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	$ 74
Trade names and associated trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	4 years	4 years
Gross Carrying Amount	$ 15	$ 8
Accumulated Amortization	6	4
Total	9	4
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	$ 9	$ 4
Trade names and associated trademarks | General Finance Corporation
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Amortization Period	4 years
Total	$ 5
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Total	$ 5