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Commitments and Contingencies (Guarantees and Other Narrative) (Details)
$ in Millions
Sep. 30, 2024
USD ($)
Guarantor Obligations [Line Items]  
Equity contributions or payments required $ 0.0
Purchase obligations in 2024 7,514.0
Unconditional purchase obligations 15,891.0
Purchase Commitments for Plant and Equipment  
Guarantor Obligations [Line Items]  
Unconditional purchase obligations 8,800.0
NEOM Green Hydrogen Company  
Guarantor Obligations [Line Items]  
Unconditional purchase obligations 3,000.0
Helium Purchases  
Guarantor Obligations [Line Items]  
Unconditional purchase obligations 6,200.0
Jazan Gas Projects Company | Performance Guarantee  
Guarantor Obligations [Line Items]  
Maximum potential payment under guarantees 244.5
Variable Interest Entity, Primary Beneficiary  
Guarantor Obligations [Line Items]  
Maximum potential payment under guarantees $ 900.0