Segment Information (Reconciliation to Income (loss) from Continuing Operations) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	$ 1,585	$ 1,366	$ 4,251	$ 3,508
Selling, general and administrative expenses	(374)	(356)	(1,134)	(1,022)
Restructuring charge	(5)	1	(24)	0
Non-rental depreciation and amortization	(107)	(90)	(329)	(278)
Interest expense, net	(163)	(106)	(474)	(313)
Other income, net	7	1	19	12
Income before provision for income taxes	943	816	2,309	1,907
Total equipment rentals gross profit
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	1,350	1,209	3,526	3,046
Gross profit from other lines of business
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	$ 235	$ 157	$ 725	$ 462