Acquisitions (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	Mar. 15, 2024	Jun. 30, 2024	Dec. 31, 2023
Business Acquisition [Line Items]
Goodwill		$ 6,749	$ 5,940
Yak
Business Acquisition [Line Items]
Accounts receivable	$ 99
Inventory	8
Rental equipment	143
Property and equipment	32
Intangible assets (customer relationships)	150
Operating lease right-of-use assets	6
Other assets	17
Total identifiable assets acquired	455
Accounts payable, accrued expenses and other liabilities	(103)
Operating lease liabilities	(6)
Total liabilities assumed	(109)
Net identifiable assets acquired	346
Goodwill	810
Net assets acquired	1,156
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