Amount of assets pledged to secure a debt instrument.

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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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-Publisher FASB
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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Debt - Trade Receivables Facility (Details) - USD ($)			6 Months Ended
Debt - Trade Receivables Facility (Details) - USD ($)	Apr. 22, 2020	Feb. 25, 2020	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Debt Instrument [Line Items]
Proceeds from borrowings		$ 592,000,000	$ 1,132,000,000	$ 162,000,000
Repayments on borrowings			475,000,000	137,000,000
Line of Credit \| Trade Receivables Facility \| Secured Debt
Debt Instrument [Line Items]
Original principal amount of debt			175,000,000
Long-term debt outstanding amount			90,000,000		$ 0
Proceeds from borrowings			90,000,000
Total borrowing capacity remaining	$ 85,000,000			$ 28,000,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	50.00%
Line of Credit \| Trade Receivables Facility \| Secured Debt \| Financing Subsidiary
Debt Instrument [Line Items]
Accounts receivable pledged as collateral			$ 201,000,000		$ 259,000,000