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Commitments and Contingent Liabilities - Environmental - Narrative (Details)
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2019
USD ($)
Lawsuit
Mar. 31, 2024
USD ($)
Lawsuit
Owner
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Oct. 31, 2020
Lawsuit
Sep. 30, 2020
Lawsuit
Environmental Remediation [Line Items]            
Environmental remediation expense   $ 13,000,000 $ 14,000,000      
Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration]   Restructuring Charges Asset Related And Other Charges Restructuring Charges Asset Related And Other Charges      
Civil penalty and investigative costs   $ 68,000,000   $ 68,000,000    
Accrual for environmental remediation activities   581,000,000   590,000,000    
Environmental liabilities indemnification maximum amount   78,000,000        
Obligation related to indemnification   $ 0   0    
Indemnification expiration period   2026-12        
Outstanding amount in escrow account   $ 0   0    
Off-site Replacement Drinking Water Supplies [Member]            
Environmental Remediation [Line Items]            
Accrued for operation, maintenance, and monitoring period   20 years        
Accrual for environmental remediation activities   $ 148,000,000   147,000,000    
Disbursements period   20 years        
Assessment And Sampling Drinking Water Supplies [Member]            
Environmental Remediation [Line Items]            
Accrual for environmental remediation activities   $ 27,000,000   28,000,000    
On-site Surface Water and Groundwater Remediation [Member]            
Environmental Remediation [Line Items]            
Estimated cost of remediation   $ 203,000,000   208,000,000    
OM&M projected paid period   20 years        
PFAS Matters [Member]            
Environmental Remediation [Line Items]            
Civil penalty and investigative costs $ 13,000,000          
Number of lawsuits filed | Lawsuit 4          
PFOA [Member]            
Environmental Remediation [Line Items]            
Number of lawsuits filed | Lawsuit         2 3
Compensatory and Punitive Damages [Member]            
Environmental Remediation [Line Items]            
Number of private well owners seeking for damages | Owner   2,400        
Number of lawsuits filed | Lawsuit   2        
Fayetteville Works, Fayetteville, North Carolina [Member]            
Environmental Remediation [Line Items]            
Environmental remediation expense   $ 7,000,000 $ 9,000,000      
Accrual for environmental remediation activities [1]   $ 378,000,000   $ 383,000,000    
Fayetteville Works, Fayetteville, North Carolina [Member] | Groundwater Extraction And Treatment System [Member] | On-site Surface Water and Groundwater Remediation [Member]            
Environmental Remediation [Line Items]            
Accrued for operation, maintenance, and monitoring period   20 years        
Estimated operation starting year   2023        
Fayetteville Works, Fayetteville, North Carolina [Member] | PFAS Matters [Member]            
Environmental Remediation [Line Items]            
Percentage of efficiency to control PFAS   99.99%        
Reduction of PFAS maximum period   2 years        
Percentage of baseline   75.00%        
Minimum [Member]            
Environmental Remediation [Line Items]            
Average time frame of disbursements of environmental site remediation   15 years        
Maximum [Member]            
Environmental Remediation [Line Items]            
Average time frame of disbursements of environmental site remediation   20 years        
Loss contingency, potential additional loss   $ 730,000,000        
[1] For more information on this matter refer to “Fayetteville Works, Fayetteville, North Carolina” within this “Note 16 – Commitments and Contingent Liabilities”.