Segment Information (Geographic Area Information) (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 from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									$ 3,588	$ 3,395	$ 2,501
Revenues	$ 4,095	$ 3,992	$ 3,773	$ 3,485	$ 3,728	$ 3,765	$ 3,554	$ 3,285	15,345	14,332	11,642
Goodwill and other intangible assets, net	7,563				6,610				7,563	6,610
Property and equipment, net
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	1,034				903				1,034	903
Total equipment rentals
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	14,931				14,001				14,931	14,001
Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									13,991	13,063	10,488
Goodwill and other intangible assets, net	6,910				6,031				6,910	6,031
Domestic  | Property and equipment, net
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	942				842				942	842
Domestic  | Total equipment rentals
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	13,634				12,679				13,634	12,679
Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,354	1,269	1,154
Goodwill and other intangible assets, net	653				579				653	579
Foreign | Property and equipment, net
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	92				61				92	61
Foreign | Total equipment rentals
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 1,297				$ 1,322				1,297	1,322
Total equipment rentals
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									1,272	1,127	975
Revenues									13,029	12,064	10,116
Total equipment rentals | Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									11,919	11,045	9,139
Total equipment rentals | Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									1,110	1,019	977
Sales of rental equipment
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									1,521	1,574	965
Revenues									1,521	1,574	965
Sales of rental equipment | Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									1,379	1,427	870
Sales of rental equipment | Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									142	147	95
Sales of new equipment
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									282	218	154
Revenues									282	218	154
Sales of new equipment | Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									242	168	122
Sales of new equipment | Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									40	50	32
Contractor supplies sales
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									155	146	126
Revenues									155	146	126
Contractor supplies sales | Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									131	130	109
Contractor supplies sales | Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									24	16	17
Service and other revenues
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									358	330	281
Revenues									358	330	281
Service and other revenues | Domestic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									320	293	248
Service and other revenues | Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from contract with customer, excluding assessed tax									$ 38	$ 37	$ 33