Commitments and Contingencies (Unaudited) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Environmental Matters
Accrual for Environmental Remediation Costs	$ 561	$ 547
Loss Contingency, Range of Possible Loss, Portion Not Accrued	402	380
Recorded Third-Party Environmental Recoveries, Amount	514	502
Financial Arrangements
Standby Unused Letters Of Credit and bank guarantees	597
Surety Bond Outstanding	$ 271
Line of Credit Facility
Line of Credit Facility, Covenant Compliance	the company was in compliance with all covenants under its credit agreements.
Line of Credit Facility, Covenant Terms, Maximum Debt to Capitalization Ratio	The company also cannot permit the ratio of its debt to capitalization (as set forth in the credit agreement) to exceed 65 percent.
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs	$ 561	547
Loss Contingency, Range of Possible Loss, Portion Not Accrued	402	380
Recorded Third-Party Environmental Recoveries, Amount	$ 514	$ 502
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Compliance	the company was in compliance with all covenants under its credit agreements.
Line of Credit Facility, Covenant Terms, Maximum Debt to Capitalization Ratio	The company also cannot permit the ratio of its debt to capitalization (as set forth in the credit agreement) to exceed 65 percent.
2025 Five Year Term
Line of Credit Facility
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,000
Line of Credit Outstanding	0
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	3,000
Line of Credit Outstanding	0
Other Current Liabilities [Member]
Environmental Matters
Accrual for Environmental Remediation Costs	213
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs	213
Other Noncurrent Liabilities [Member]
Environmental Matters
Accrual for Environmental Remediation Costs	348
Site Contingency [Line Items]
Accrual for Environmental Remediation Costs	348
Other Current Assets [Member]
Environmental Matters
Recorded Third-Party Environmental Recoveries, Amount	197
Site Contingency [Line Items]
Recorded Third-Party Environmental Recoveries, Amount	197
Other Noncurrent Assets [Member]
Environmental Matters
Recorded Third-Party Environmental Recoveries, Amount	317
Site Contingency [Line Items]
Recorded Third-Party Environmental Recoveries, Amount	317
Commercial Paper [Member]
Line of Credit Facility
Commercial Paper, Maximum Borrowing Capacity (New)	3,000
Commercial Paper, at Carrying Value	$ 500
Commercial Paper, Average Rate Paid	3.96%
Line of Credit Facility [Line Items]
Commercial Paper, Maximum Borrowing Capacity (New)	$ 3,000
Commercial Paper, at Carrying Value	$ 500
Commercial Paper, Average Rate Paid	3.96%