XML 61 R52.htm IDEA: XBRL DOCUMENT v3.22.1

Fair Value Measurements - Summary of Investment Income, Net Gains and Losses Realized and Disbursements Related to Investments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended			12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022		Mar. 31, 2021	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Investment income	$ 2	$ 3	$ 10	[1]	$ 8	$ 12	[1]
Net gains (losses)	(28)	(7)	(24)		11
Disbursements	$ (21)	$ (10)	$ (28)		$ (18)	$ (33)
[1] Investment income relates to the demand deposit and includes interest income as well as dividend income transferred from the equity and fixed income mutual funds

X

- Definition

The cash outflow of all demand deposits, including checking and negotiable order or withdrawal (NOW) accounts.

+ References

No definition available.

+ Details

Name:	ash_DisbursementsDemandDeposit
Namespace Prefix:	ash_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(3)(d))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117546-209714

+ Details

Name:	us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount before accretion (amortization) of purchase discount (premium) of interest income and dividend income on nonoperating securities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.7(a),(b))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

+ Details

Name:	us-gaap_InvestmentIncomeInterestAndDividend
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration