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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”.

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