Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Revenues, Topic 842	$ 2,215	$ 1,777	$ 4,185	$ 3,295
Revenues, Topic 606	556	510	1,110	1,049
Revenues, Total	2,771	2,287	5,295	4,344
Equipment rentals
Revenues:
Revenues, Topic 842	2,215	1,777	4,185	3,295
Revenues, Topic 606	247	174	452	323
Revenues, Total	2,462	1,951	4,637	3,618
Owned equipment rentals
Revenues:
Owned equipment rentals, Topic 842	2,018	1,635	3,815	3,040
Revenues, Total	2,018	1,635	3,815	3,040
Re-rent revenue
Revenues:
Re-rent revenue, Topic 842	55	42	104	74
Revenues, Total	55	42	104	74
Delivery and pick-up
Revenues:
Revenues, Topic 606	205	148	362	264
Revenues, Total	205	148	362	264
Other
Revenues:
Other, Topic 842	142	100	266	181
Revenues, Topic 606	42	26	90	59
Revenues, Total	184	126	356	240
Total ancillary and other rental revenues
Revenues:
Revenues, Topic 842	142	100	266	181
Revenues, Topic 606	247	174	452	323
Revenues, Total	389	274	718	504
Sales of rental equipment
Revenues:
Revenues, Topic 606	164	194	375	461
Revenues, Total	164	194	375	461
Sales of new equipment
Revenues:
Revenues, Topic 606	38	57	83	106
Revenues, Total	38	57	83	106
Contractor supplies sales
Revenues:
Revenues, Topic 606	33	27	62	51
Revenues, Total	33	27	62	51
Service and other revenues
Revenues:
Revenues, Topic 606	74	58	138	108
Revenues, Total	$ 74	$ 58	$ 138	$ 108