Leases (Reconciliation of Undiscounted Cash Flows to the Operating and Finance Leases) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Operating Leases
2023	$ 285
2024	232
2025	164
2026	129
2027	112
Thereafter	768
Total future lease payments	1,690
Less imputed interest	334
Present value of future lease payments	1,356
Less current portion of lease liabilities	250	$ 258
Long-term lease liabilities	$ 1,106	$ 1,085
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
ROU assets	$ 1,263	$ 1,257
Finance Leases
2023	46
2024	29
2025	26
2026	24
2027	23
Thereafter	178
Total future lease payments	326
Less imputed interest	64
Present value of future lease payments	262
Less current portion of lease liabilities	38	79
Long-term lease liabilities	224	258
ROU assets	$ 227	$ 319
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other current liabilities	Other current liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets