Payment of accrued and unpaid interest on early redemption of senior notes.

No definition available.

Name:	a_PaymentOfAccruedAndUnpaidInterest
Namespace Prefix:	a_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Proceeds obtained expressed as a percentage of debt instrument face value.

+ References

No definition available.

+ Details

Name:	a_PercentageOfFaceAmountOfSeniorNoteInstrumentIssued
Namespace Prefix:	a_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the debt agreement requires the first payment to be made, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-Section 50
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-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

+ References

+ Details

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Namespace Prefix:	us-gaap_
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- Details

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Period Type:

LONG-TERM DEBT - Text (Details) - USD ($) $ in Millions		3 Months Ended
LONG-TERM DEBT - Text (Details) - USD ($) $ in Millions	Sep. 13, 2012	Jan. 31, 2021	Jan. 31, 2020
Debt Instrument
Early Repayment of Senior Debt		$ 105	$ 0
Senior Notes 2022
Debt Instrument
Issuance date of debt	Sep. 13, 2012
Aggregate face amount of debt	$ 400
Percentage Of Face Amount Of Senior Note Instrument Issued	99.80%
Maturity date of debt	Oct. 01, 2022
Fixed interest rate per annum	3.20%
Date interest payment commenced	Apr. 01, 2013
Early Repayment of Senior Debt		105
Repayments of Senior Debt		100
Payment of accrued and unpaid interest		$ 1