Revenue Recognition (Changes in Accounting Principles) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues:
Revenues, Topic 842	$ 3,291	$ 3,118	$ 9,188	$ 8,681
Revenues, Topic 606	938	874	2,703	2,569
Total revenues	4,229	3,992	11,891	11,250
Total equipment rentals
Revenues:
Revenues, Topic 842	3,291	3,118	9,188	8,681
Revenues, Topic 606	374	345	1,037	926
Total revenues	3,665	3,463	10,225	9,607
Owned equipment rentals
Revenues:
Owned equipment rentals, Topic 842	2,937	2,804	8,204	7,812
Total revenues	$ 2,937	$ 2,804	$ 8,204	$ 7,812
Operating lease, lease income, statement of income or comprehensive income [extensible enumeration]	Total revenues	Total revenues	Total revenues	Total revenues
Re-rent revenue
Revenues:
Re-rent revenue, Topic 842	$ 73	$ 71	$ 196	$ 184
Total revenues	73	71	196	184
Delivery and pick-up
Revenues:
Revenues, Topic 606	313	297	859	778
Total revenues	313	297	859	778
Other
Revenues:
Other, Topic 842	281	243	788	685
Revenues, Topic 606	61	48	178	148
Total revenues	342	291	966	833
Total ancillary and other rental revenues
Revenues:
Revenues, Topic 842	281	243	788	685
Revenues, Topic 606	374	345	1,037	926
Total revenues	655	588	1,825	1,611
Sales of rental equipment
Revenues:
Revenues, Topic 606	333	321	1,027	1,069
Total revenues	333	321	1,027	1,069
Sales of new equipment
Revenues:
Revenues, Topic 606	95	77	240	186
Total revenues	95	77	240	186
Contractor supplies sales
Revenues:
Revenues, Topic 606	43	38	120	116
Total revenues	43	38	120	116
Service and other revenues
Revenues:
Revenues, Topic 606	93	93	279	272
Total revenues	$ 93	$ 93	$ 279	$ 272