Segment Information (Reconciliation to Income (loss) from Continuing Operations) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	$ 1,425	$ 1,150	$ 2,666	$ 2,142
Selling, general and administrative expenses	(378)	(343)	(760)	(666)
Restructuring charge	(18)	(1)	(19)	(1)
Non-rental depreciation and amortization	(104)	(91)	(222)	(188)
Interest expense, net	(161)	(113)	(311)	(207)
Other income, net	8	6	12	11
Income before provision for income taxes	772	608	1,366	1,091
Total equipment rentals gross profit
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Equipment rentals gross profit	1,173	1,003	2,176	1,837
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	$ 252	$ 147	$ 490	$ 305