Leases - Schedule Of Lease-Related Assets And Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Assets:
Operating leases	$ 2,130	$ 2,131
Finance leases	607	646
Total lease assets	$ 2,737	$ 2,777
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property, Plant and Equipment, Net	Property, Plant and Equipment, Net
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Operating leases	Operating leases
Liabilities
Operating leases	$ 352	$ 343
Finance leases	133	162
Right-of-use operating lease obligations	1,853	1,863
Finance leases	625	624
Total lease liabilities	$ 2,963	$ 2,992
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Short-term borrowings and long-term debt due within one year	Short-term borrowings and long-term debt due within one year
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Accrued Liabilities, Current	Other Accrued Liabilities, Current
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Long-Term Debt, Excluding Current Maturities	Long-Term Debt, Excluding Current Maturities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Right-of-use operating lease obligations	Right-of-use operating lease obligations
Weighted-average remaining term:
Operating leases	11 years 4 months 24 days	11 years 3 months 18 days
Finance leases	11 years 1 month 6 days	10 years 6 months
Weighted-average discount rate:
Operating leases	5.30%	5.10%
Finance leases	5.60%	5.30%