Debt instrument due year.

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Line of credit facility, weighted average interest rate.

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Payment towards imputed interest.

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Repayment period of capital lease obligation.

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Weighted average interest rate of medium term notes.

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Weighted average maturity of outstanding medium term notes.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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The total charge for the use of long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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

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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.

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

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Amount, after accumulated amortization, of debt discount.

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Amount of paid and unpaid preferred stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Date the credit facility terminates, in CCYY-MM-DD format.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including the current and noncurrent portions, carrying value at the balance sheet date of a financial instrument used to receive debt funding on a regular basis with original maturities ranging from 5-10 years.

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The fair value of notes issued in noncash investing and financing activities.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The percentage rate used to calculate dividend payments on preferred stock.

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The redemption (or callable) amount of currently redeemable preferred stock. Includes amounts representing dividends not currently declared or paid but which will be payable under the redemption features or for which ultimate payment is solely within the control of the issuer.

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The cash inflow from borrowings supported by a written promise to pay an obligation that is uncollateralized (where debt is not backed by the pledge of collateral).

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The cash outflow for the obligation for a lease meeting the criteria for capitalization (with maturities exceeding one year or beyond the operating cycle of the entity, if longer).

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Weighted average interest rate of short-term debt outstanding calculated at point in time.

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Debt and Other Obligations - Additional Information (Detail)	1 Months Ended					12 Months Ended
	Jun. 30, 2019 USD ($)	Nov. 30, 2018 USD ($)	Sep. 30, 2016 USD ($)	Nov. 30, 2013 USD ($)	Jul. 31, 2012 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	May 31, 2019 EUR (€)	Oct. 31, 2015 USD ($)
Debt Instrument [Line Items]
Revolving credit facility, committed amount						$ 1,000,000,000
Long-term debt						1,026,000,000
Unsecured medium term notes outstanding issued						$ 23,000,000	$ 53,000,000
Maturity of the total outstanding medium term notes, years						5 years
Weighted average interest of medium term notes						7.96%
Capital lease obligations						$ 12,000,000	11,000,000
Repayments of long-term capital lease obligations						$ 21,000,000
Repayment period of capital lease obligation, years						14 years
Payment towards imputed interest						$ 9,000,000
Original cost of capital lease assets						20,000,000	20,000,000
Accumulated depreciation of assets under capital leases						13,000,000	13,000,000
Short-term borrowings						33,000,000	249,000,000
NHUMO [Member]
Debt Instrument [Line Items]
Preferred stock repurchase amount		$ 25,000,000		$ 25,000,000
Dividend percentage of preferred stock				6.00%
Preferred stock dividend		$ 1,400,000
Commercial Paper [Member]
Debt Instrument [Line Items]
Short-term borrowings						$ 33,000,000	$ 249,000,000
Weighted-average interest rate						2.27%	2.36%
Short-term Notes Payable [Member]
Debt Instrument [Line Items]
Short-term borrowings						$ 0	$ 0
Chinese Renminbi Debt [Member]
Debt Instrument [Line Items]
Long-term debt						$ 4,000,000	$ 4,000,000
2.55% Notes Due 2018 [Member]
Debt Instrument [Line Items]
Debt maturity date						Jan. 15, 2018
Registered unsecured notes issued					$ 250,000,000
Debt instrument, discount					$ 1,000,000
Proceeds from issuance of unsecured notes						$ 248,000,000
2.55% Notes Due 2018 [Member] \| Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate					2.55%
Debt instrument due, year						2018
3.7% Notes due fiscal 2022 [Member]
Debt Instrument [Line Items]
Debt maturity date						Jul. 15, 2022
Debt instrument, interest rate						3.70%	3.70%
Registered unsecured notes issued					$ 350,000,000
Debt instrument, discount					$ 1,000,000
Proceeds from issuance of unsecured notes						$ 347,000,000
Debt instrument due, year						2022	2022
3.7% Notes due fiscal 2022 [Member] \| Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate					3.70%
Debt instrument due, year						2022
3.4% Notes due fiscal 2026 [Member]
Debt Instrument [Line Items]
Debt maturity date						Sep. 15, 2026
Debt instrument, interest rate						3.40%	3.40%
Registered unsecured notes issued			$ 250,000,000
Debt instrument, discount			$ 1,000,000
Proceeds from issuance of unsecured notes						$ 248,000,000
Debt instrument due, year						2026	2026
3.4% Notes due fiscal 2026 [Member] \| Fixed Rate Debt [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate			3.40%
Debt instrument due, year						2026
4.0% Notes due 2029 [Member]
Debt Instrument [Line Items]
Debt issuance cost	$ 3,000,000
Debt maturity date	Jul. 01, 2029
Debt instrument, interest rate	4.00%					4.00%	4.00%
Registered unsecured notes issued	$ 300,000,000
Debt instrument, discount	1,000,000
Proceeds from issuance of unsecured notes	$ 296,000,000
Debt instrument due, year	2029					2029	2029
Revolving Credit Facility, expires fiscal 2023 [Member]
Debt Instrument [Line Items]
Amount available under credit facility						$ 967,000,000
Revolving credit facility, committed amount									$ 1,000,000,000
Debt instrument, maturity date						Oct. 23, 2022
Debt instrument due, year						2023	2023
Revolving Credit Facility - Canada, expires fiscal 2021 [Member]
Debt Instrument [Line Items]
Revolving credit facility, committed amount							$ 100,000,000
Debt instrument, maturity date						Sep. 24, 2021
Credit agreement, available borrowing						$ 57,000,000
Revolving credit facility, weighted average interest rate						3.21%
Debt instrument due, year						2021	2021
Revolving Credit Facility - Euro, expires fiscal 2024 [Member]
Debt Instrument [Line Items]
Revolving credit facility, committed amount \| €								€ 300,000,000
Debt instrument, maturity date						May 22, 2024
Credit agreement, available borrowing						$ 272,000,000
Revolving credit facility, weighted average interest rate						3.42%
Debt issuance cost						$ 1,000,000
Debt instrument due, year						2024	2024
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Debt instrument due, year						2020
Standby letters of credit, outstanding amount						$ 5,000,000