Leases (Summary of Financial Information Associated with Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Operating lease right-of-use assets	$ 819	$ 784
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	$ 1,049	$ 1,023
Current
Accrued expenses and other liabilities	211	202
Short-term debt and current maturities of long-term debt	51	53
Long-term
Operating lease liabilities	$ 642	$ 621
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-term debt	Long-term debt
Long-term debt	$ 72	$ 82
Total lease liabilities	976	958
Property and equipment, net
Assets
Accumulated depreciation	(20)	(19)
Finance lease, right-of-use asset	13	12
Sales of rental equipment
Assets
Finance lease, right-of-use asset, before accumulated amortization	321	329
Accumulated depreciation	(104)	(102)
Finance lease, right-of-use asset	217	227
Non-rental vehicles
Assets
Finance lease, right-of-use asset, before accumulated amortization	8	8
Buildings
Assets
Finance lease, right-of-use asset, before accumulated amortization	$ 25	$ 23