Annual report pursuant to Section 13 and 15(d)

Selected Quarterly Financial Data (unaudited) - Narrative (Details)

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Selected Quarterly Financial Data (unaudited) - Narrative (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Inventory casualty loss adjustment $ 14,900,000,000              
Inventory Adjustments $ 6,676,000,000         $ 6,676,000,000    
Proceeds from federal relief grants           $ 1,123,000 $ 4,299,000 $ 4,629,000
Discontinued Operations, Held-for-sale                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Gain on sale of assets   $ 5,616,000,000 $ 26,554,000,000 $ 8,445,000,000        
Grove Management Services                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Operating Revenue   3,367,000,000 4,057,000,000 3,128,000,000 $ 3,083,000,000      
Operating expenses   $ 2,966,000,000 $ 3,795,000,000 $ 2,902,000,000 $ 3,015,000,000