Leases (Lease Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Lessee, Lease, Description [Line Items]
Sublease income	$ (258)	$ (233)	$ (235)
Net lease cost	465	434	308
Short-term lease, cost	222	209	195
Cost of equipment rentals, excluding depreciation
Lessee, Lease, Description [Line Items]
Operating lease cost	647	582	494
Selling, general and administrative expenses
Lessee, Lease, Description [Line Items]
Operating lease cost	14	12	11
Restructuring charges
Lessee, Lease, Description [Line Items]
Operating lease cost	3	27	0
Depreciation of rental equipment
Lessee, Lease, Description [Line Items]
Finance lease cost	46	36	31
Non-rental depreciation and amortization
Lessee, Lease, Description [Line Items]
Finance lease cost	1	2	2
Interest expense, net
Lessee, Lease, Description [Line Items]
Interest on lease liabilities	$ 12	$ 8	$ 5