Acquisitions (Narrative) (Details) rental_unit in Thousands, $ in Millions		3 Months Ended								12 Months Ended
	May 25, 2021 USD ($)	Dec. 31, 2021 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($) rental_unit	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Revenues		$ 2,776	$ 2,596	$ 2,287	$ 2,057	$ 2,279	$ 2,187	$ 1,939	$ 2,125	$ 9,716	$ 8,530	$ 9,351
General Finance Corporation
Business Acquisition [Line Items]
Consideration transferred	$ 1,032
Intangibles	$ 94
Other acquisitions
Business Acquisition [Line Items]
Intangibles		$ 66								66
General Finance Corporation
Business Acquisition [Line Items]
Rental fleet, number of units (approximately) | rental_unit					100
Property subject to or available for operating lease, gross					$ 650
Revenues										$ 144	$ 342