Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Re-rent revenue, Topic 842									$ 235	$ 194	$ 142
Revenues, Topic 842									9,141	7,460	6,536
Revenues, Topic 606									2,501	2,256	1,994
Revenues, Total	$ 3,296	$ 3,051	$ 2,771	$ 2,524	$ 2,776	$ 2,596	$ 2,287	$ 2,057	$ 11,642	$ 9,716	$ 8,530
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									$ 9,141	$ 7,460	$ 6,536
Revenues, Topic 606									975	747	604
Revenues, Total									10,116	8,207	7,140
Owned equipment rentals
Revenues:
Owned equipment rentals, Topic 842									8,310	6,840	6,056
Revenues, Total									8,310	6,840	6,056
Re-rent revenue
Revenues:
Re-rent revenue, Topic 842									235	194	142
Revenues, Total									235	194	142
Delivery and pick-up
Revenues:
Revenues, Topic 606									799	616	506
Revenues, Total									799	616	506
Other
Revenues:
Other, Topic 842									596	426	338
Revenues, Topic 606									176	131	98
Revenues, Total									772	557	436
Total ancillary and other rental revenues
Revenues:
Revenues, Topic 842									596	426	338
Revenues, Topic 606									975	747	604
Revenues, Total									1,571	1,173	942
Sales of rental equipment
Revenues:
Revenues, Topic 606									965	968	858
Revenues, Total									965	968	858
Sales of new equipment
Revenues:
Revenues, Topic 606									154	203	247
Revenues, Total									154	203	247
Contractor supplies sales
Revenues:
Revenues, Topic 606									126	109	98
Revenues, Total									126	109	98
Service and other revenues
Revenues:
Revenues, Topic 606									281	229	187
Revenues, Total									$ 281	$ 229	$ 187