Acquisitions (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	Mar. 15, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Goodwill		$ 6,900	$ 5,940	$ 6,026	$ 5,528
Yak
Business Acquisition [Line Items]
Accounts receivable	$ 99
Inventory	8
Rental equipment	127
Property and equipment	28
Intangible assets (customer relationships)	150
Operating lease right-of-use assets	4
Other assets	18
Total identifiable assets acquired	434
Accounts payable, accrued expenses and other liabilities	(100)
Operating lease liabilities	(4)
Total liabilities assumed	(104)
Net identifiable assets acquired	330
Goodwill	828
Net assets acquired	1,158
Business combination, acquired receivable, fair value	99
Gross contractual amount	102
Estimated amount uncollectible	$ 3
Yak | Customer relationships
Business Acquisition [Line Items]
Life (years)	6 years