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

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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

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Balance Type:	na
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- 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

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Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

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.

+ References

No definition available.

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Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

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Balance Type:	credit
Period Type:	duration

- Definition

Average amount borrowed under the credit facility during the period.

+ References

No definition available.

+ Details

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

- Definition

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.

+ References

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Period Type:	instant

- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of short-term debt outstanding calculated over time.

+ References

No definition available.

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

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	duration

- Definition

For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, the maximum amount borrowed at any time during the period.

+ References

No definition available.

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Commercial Paper and Long-Term Debt (Details) - USD ($)	1 Months Ended			9 Months Ended		12 Months Ended
Commercial Paper and Long-Term Debt (Details) - USD ($)	Nov. 25, 2020	Oct. 31, 2020	Apr. 30, 2020	Oct. 31, 2020	Nov. 02, 2019	Feb. 01, 2020	Mar. 31, 2020
Debt Instrument [Line Items]
Loss on debt extinguishment				$ (512,000,000)	$ 0
Commercial Paper
Debt Instrument [Line Items]
Average daily amount outstanding				0	55,000,000
Maximum amount outstanding during period					$ 744,000,000
Weighted average interest rate					2.40%
Amount outstanding					$ 0
Unsecured Debt
Debt Instrument [Line Items]
Repurchased face amount		$ 1,770,000,000		1,770,000,000
Market value of debt repurchased		2,250,000,000		2,250,000,000
Loss on debt extinguishment		(512,000,000)
Unsecured Fixed Rate 2.250 Percent Debt, Maturing 2025 \| Unsecured Debt
Debt Instrument [Line Items]
Face amount							$ 1,500,000,000
Interest rate							2.25%
Unsecured Fixed Rate 2.650 Percent Debt, Maturing 2030 \| Unsecured Debt
Debt Instrument [Line Items]
Face amount							$ 1,000,000,000.0
Interest rate							2.65%
Credit Facility Expiring April 2021 \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity			$ 900,000,000
Term of debt			364 days
Line of credit facility, outstanding balance				0
Credit Facility Expiring April 2021 \| Revolving Credit Facility \| Subsequent Event
Debt Instrument [Line Items]
Term of debt	364 days
Credit Facility Expiring October 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, borrowing capacity		$ 2,500,000,000		2,500,000,000
Line of credit facility, outstanding balance				$ 0		$ 0