Debt and Derivative Instruments - Long-term Debt (Details)	9 Months Ended
Nov. 01, 2020	Mar. 31, 2020 USD ($) tranche
Debt Instrument [Line Items]
Debt instrument redemption price (in percentage)	100.00%
Debt instrument change of control redemption price (in percentage)	101.00%
Senior notes
Debt Instrument [Line Items]
Number of tranches of senior notes \| tranche		4
Issuance costs		$ 36,000,000
Senior notes \| 2.50% Senior Notes Due April, 2027, First Tranche
Debt Instrument [Line Items]
Debt instrument face amount		$ 750,000,000
Debt instrument interest rate (in percentage)		2.50%
Debt instrument unamortized discount		$ 4,000,000
Senior notes \| 2.70% Senior Notes Due April, 2030, Second Tranche
Debt Instrument [Line Items]
Debt instrument face amount		$ 1,500,000,000
Debt instrument interest rate (in percentage)		2.70%
Debt instrument unamortized discount		$ 8,000,000
Senior notes \| 3.30% Senior Notes Due April, 2040, Third Tranche
Debt Instrument [Line Items]
Debt instrument face amount		$ 1,250,000,000
Debt instrument interest rate (in percentage)		3.30%
Debt instrument unamortized discount		$ 11,000,000
Senior notes \| 3.35% Senior Notes Due April, 2050, Fourth Tranche
Debt Instrument [Line Items]
Debt instrument face amount		$ 1,500,000,000
Debt instrument interest rate (in percentage)		3.35%
Debt instrument unamortized discount		$ 17,000,000

Debt Instrument, Change of Control, Redemption Price, Percent

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Debt Instrument, Number of Tranches

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- Definition

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

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- Definition

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

+ References

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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.

+ References

No definition available.

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- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Amount, after accumulated amortization, of debt discount.

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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