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Divestitures - Additional Information (Detail) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | --- | ---
Mar. 01, 2022 | Mar. 31, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2022 | Sep. 30, 2021
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  | $ 79 |
Accounts and notes receivable |  | $ 791 | $ 791 |  | 791 | $ 645
Impairment charge |  |  | 7 |  | 204 |
Purification Solutions [Member] |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of business |  | 79 |  |  |  |
Proceeds from divestiture of cash transferred |  | 11 |  |  |  |
Accounts and notes receivable |  | 11 | 11 |  | 11 |
Pre-tax loss on sale |  |  | 7 |  |  |
Impairment charge |  |  |  | $ 197 |  |
Impairment charge after tax |  |  |  |  | 167 |
Purification Solutions [Member] | One Equity Partners [Member] |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |
Proceeds from sale of business | $ 90 |  |  |  |  |
Proceeds from divestiture of cash transferred | $ 7 |  |  |  |  |
Marshall Mine | ADA Carbon Solutions, LLC [Member] |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items] |  |  |  |  |  |
Accounts payable and accrued liabilities |  | $ 11 | $ 11 |  | $ 11 |

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