Leases - Schedule Of Lease-Related Assets And Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets:
Operating leases	$ 2,131	$ 2,207
Finance leases	646	556
Total lease assets	$ 2,777	$ 2,763
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	$ 343	$ 363
Finance leases	162	166
Right-of-use operating lease obligations	1,863	1,903
Finance leases	624	541
Total lease liabilities	$ 2,992	$ 2,973
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Less amounts due within one year	Less amounts 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 3 months 18 days	11 years 9 months 18 days
Finance leases	10 years 6 months	9 years
Weighted-average discount rate:
Operating leases	5.10%	4.90%
Finance leases	5.30%	4.90%