Revenue Recognition (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
Revenues:
Re-rent revenue, Topic 842									$ 258	$ 233	$ 235
Revenues, Topic 842									11,757	10,937	9,141
Revenues, Topic 606									3,588	3,395	2,501
Revenues, Total	$ 4,095	$ 3,992	$ 3,773	$ 3,485	$ 3,728	$ 3,765	$ 3,554	$ 3,285	$ 15,345	$ 14,332	$ 11,642
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]									Revenues, Total	Revenues, Total	Revenues, Total
Total equipment rentals
Revenues:
Revenues, Topic 842									$ 11,757	$ 10,937	$ 9,141
Revenues, Topic 606									1,272	1,127	975
Revenues, Total									13,029	12,064	10,116
Owned equipment rentals
Revenues:
Owned equipment rentals, Topic 842									10,559	9,948	8,310
Revenues, Total									10,559	9,948	8,310
Re-rent revenue
Revenues:
Re-rent revenue, Topic 842									258	233	235
Revenues, Total									258	233	235
Delivery and pick-up
Revenues:
Revenues, Topic 606									1,069	941	799
Revenues, Total									1,069	941	799
Other
Revenues:
Other, Topic 842									940	756	596
Revenues, Topic 606									203	186	176
Revenues, Total									1,143	942	772
Total ancillary and other rental revenues
Revenues:
Revenues, Topic 842									940	756	596
Revenues, Topic 606									1,272	1,127	975
Revenues, Total									2,212	1,883	1,571
Sales of rental equipment
Revenues:
Revenues, Topic 606									1,521	1,574	965
Revenues, Total									1,521	1,574	965
Sales of new equipment
Revenues:
Revenues, Topic 606									282	218	154
Revenues, Total									282	218	154
Contractor supplies sales
Revenues:
Revenues, Topic 606									155	146	126
Revenues, Total									155	146	126
Service and other revenues
Revenues:
Revenues, Topic 606									358	330	281
Revenues, Total									$ 358	$ 330	$ 281