Leases (Summary of Financial Information Associated with Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Operating lease right-of-use assets	$ 1,337	$ 1,099
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Short-term debt and current maturities of long-term debt	Short-term debt and current maturities of long-term debt
Total leased assets	$ 1,738	$ 1,415
Current
Accrued expenses and other liabilities	294	249
Short-term debt and current maturities of long-term debt	83	55
Long-term
Operating lease liabilities	$ 1,089	$ 895
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt
Long-term debt	$ 180	$ 137
Total lease liabilities	1,646	1,336
Property and equipment, net
Assets
Accumulated depreciation	(33)	(27)
Finance lease, right-of-use asset	49	47
Sales of rental equipment
Assets
Finance lease, right-of-use asset, before accumulated amortization	493	395
Accumulated depreciation	(141)	(126)
Finance lease, right-of-use asset	352	269
Non-rental vehicles
Assets
Finance lease, right-of-use asset, before accumulated amortization	11	8
Buildings
Assets
Finance lease, right-of-use asset, before accumulated amortization	$ 71	$ 66