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Additional funding available, subject to additional commitments made by lenders, under Company's syndicated credit facility.

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

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Face (par) amount of the original debt instrument that was repurchased.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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The difference between the reacquisition price and the net carrying amount of the extinguished debt recognized currently as a component of income in the period of extinguishment, net of tax.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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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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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 long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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Debt - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2023	Jan. 31, 2023	Apr. 01, 2022	Mar. 31, 2022	Feb. 28, 2022
Debt Instrument [Line Items]
Short-term debt, weighted average interest rate		3.43%	1.00%
Line of Credit Facility, Maximum Borrowing Capacity						$ 3,250
Aggregate annual maturities of long-term debt, 2024		$ 1,625
Aggregate annual maturities of long-term debt, 2025		2,161
Aggregate annual maturities of long-term debt, 2026		1,073
Aggregate annual maturities of long-term debt, 2027		2,916
Aggregate annual maturities of long-term debt, 2028		2,183
Letters Of Credit Issuable Under Credit Facility						100
Swingline Loans Issuable Under Credit Facility						194
Line Of Credit Facility Maximum Additional Principal Amount Commitments						500
Loss from reverse treasury locks			$ 17
Long-Term Debt		14,738	13,886
Losses on debt extinguishment		0	24	$ 178
Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
Debt Instrument [Line Items]
Disposal Group, Including Discontinued Operation, Consideration								$ 1,266
Commercial Paper
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					$ 2,750
Short-term Debt		$ 0	$ 230
Notes 5.000% due February 15, 2030
Debt Instrument [Line Items]
Debt instrument, face amount									$ 500
Interest rate									5.00%
Notes 6.750% due February 15, 2030
Debt Instrument [Line Items]
Debt instrument, face amount							$ 200
Interest rate							6.75%
Floating Rate Notes Due June 6, 2022
Debt Instrument [Line Items]
Debt Instrument, Repurchased Face Amount							$ 199
Losses on debt extinguishment	$ 2
Floating Rate Notes Due June 6, 2022 \| Long-term Debt
Debt Instrument [Line Items]
Long-Term Debt							$ 199
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Term		5 years
Borrowings under credit facility		$ 0
Revolving Credit Facility [Member] \| Maximum
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity						$ 2,750		500
Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, face amount								$ 950