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v3.23.1

Litigation and Contingencies (Details) $ in Millions |  | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 30, 2020 shareholder | Sep. 30, 2021 mi | Jun. 30, 2018 defendant party | Sep. 30, 2017 recipient | Mar. 31, 2023 USD ($) entity unit mi | Sep. 30, 2022 USD ($) | Oct. 31, 2021 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Settlement agreement, accrued |  |  |  |  |  | $ 103 |
Environmental remediation expense |  |  |  |  | $ 33 |  |
Number of general notice letter recipients | entity |  |  |  |  | 100 |  |
Number of operable units | unit |  |  |  |  | 4 |  |
Miles of river included in the remedial investigation and feasibility study | mi |  | 9 |  |  |  |  |
Loss contingency, estimate of possible loss |  |  |  |  |  |  | $ 441
Number of parties sued (in parties) | party |  |  | 100 |  |  |  |
Number of defendants | defendant |  |  | 42 |  |  |  |
Standby letters of credit outstanding |  |  |  |  | $ 39 |  |
Lower Half of River |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Miles of river included in the remedial investigation and feasibility study | mi |  |  |  |  | 17 |  |
Lower Passaic River Matter |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Miles of river included in the remedial investigation and feasibility study | mi |  |  |  |  | 8.3 |  |
Number of general notice letter recipients involved in remedial investigation and feasibility study | recipient |  |  |  | 80 |  |  |
Lower Passaic River Matter - Selected Remedy for the Preferred Alternative |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Settlement amount |  |  |  |  | $ 1,400 |  |
Weber Et Al V Polk Et Al | Pending Litigation |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of plaintiffs | shareholder | 2 |  |  |  |  |  |

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