Segment Information (Reconciliation to Consolidated Totals) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit from other lines of business	$ 1,638	$ 1,648	$ 1,518	$ 1,346	$ 1,562	$ 1,585	$ 1,425	$ 1,241	$ 6,150	$ 5,813	$ 4,996
Selling, general and administrative expenses									(1,645)	(1,527)	(1,400)
Restructuring charges									(3)	(28)	0
Non-rental depreciation and amortization									(437)	(431)	(364)
Interest expense, net									(691)	(635)	(445)
Other income, net									14	19	15
Income before provision for income taxes									3,388	3,211	2,802
Equipment rentals
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit from other lines of business									5,198	4,814	4,245
Other products and services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Gross profit from other lines of business									$ 952	$ 999	$ 751