Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Receivables to be collected from (obligations owed to) related parties, net as of the balance sheet date where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth.

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Majority Shareholder, Ownership Percentage

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Mark-Up On Services From Related Party Agreements

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Related Party Agreements, Period Covered

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Transactions with Ashland - Narrative (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 28, 2016
Related Party Transaction [Line Items]
Period covered by related party agreeement	2 years
Mark-up on services rendered under related party agreement	5.00%
Number of shares owned by investor (in shares)	188	188
Majority Shareholder
Related Party Transaction [Line Items]
Ashland ownership percentage			83.00%
Ashland \| Affiliated Entity \| Tax Matters Agreement
Related Party Transaction [Line Items]
Due to (from) related party	$ (66)	$ (66)
Ashland \| Affiliated Entity \| Tax Matters Agreement \| Other Long-Term Liabilities
Related Party Transaction [Line Items]
Due to (from) related party	$ 78	$ 79
Ashland \| Majority Shareholder
Related Party Transaction [Line Items]
Number of shares owned by investor (in shares)			170