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Commitments and Contingent Liabilities - Environmental Matters (Narrative) (Details) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) site | Mar. 31, 2026 USD ($) site
Loss Contingencies [Line Items] |  |
Number of hazardous Substance Sites, designation as PRP | site |  | 12
Environmental Litigation |  |
Loss Contingencies [Line Items] |  |
Number of hazardous substance sites, recipient of directives | site | 1 |
Estimated environmental assessment and cleanup costs | $ 1,400 |
Environmental Litigation | New Jersey |  |
Loss Contingencies [Line Items] |  |
Estimated loss |  | $ 3
Environmental Litigation | All Sites Excluding New Jersey |  |
Loss Contingencies [Line Items] |  |
Estimated loss |  | $ 27
Hazardous substance sites | site |  | 11
Claims And Demands From Government Agencies, Environmental Conditions |  |
Loss Contingencies [Line Items] |  |
Environmental loss contingency, agreed remediation, number of sites | site |  | 4
Loss contingency, estimate of possible loss |  | $ 28
Estimated loss |  | $ 28
Environmental Loss Contingency Statement Of Financial Position Extensible Enumeration Not Disclosed Flag |  | Consolidated Balance Sheet

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