Segment Information (Reconciliation to Equipment Rentals Gross Profit) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	$ 1,518	$ 1,425	$ 2,864	$ 2,666
Selling, general and administrative expenses	(404)	(378)	(793)	(760)
Restructuring charge	(1)	(18)	(2)	(19)
Non-rental depreciation and amortization	(109)	(104)	(213)	(222)
Interest expense, net	(173)	(161)	(333)	(311)
Other income, net	4	8	7	12
Income before provision for income taxes	835	772	1,530	1,366
Total equipment rentals gross profit
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	1,285	1,173	2,388	2,176
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	$ 233	$ 252	$ 476	$ 490