Litigation and Contingencies (Details) $ in Millions		1 Months Ended			6 Months Ended
	Dec. 30, 2020 shareholder	Sep. 30, 2021 mi	Jun. 30, 2018 defendant party	Sep. 30, 2017 recipient	Jun. 30, 2023 USD ($) entity unit mi	Sep. 30, 2022 USD ($)	Oct. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Settlement agreement, accrued						$ 103
Environmental remediation expense					$ 37
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					$ 40
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