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Financing Arrangements - Carrying Value of Long-Term Debt (Detail) - USD ($) $ in Millions | Jul. 31, 2020 | Jun. 30, 2020 | Apr. 24, 2020
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total long-term debt | $ 2,630 |  | $ 1,146
Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | 2,650 |  | 1,150
Unamortized discount and issuance costs | (20) |  | (4)
Senior Notes | Due June 2021 |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | $ 0 |  | $ 500
Debt Instrument, Effective Interest Rate | 3.54% |  | 3.54%
Senior Notes | Due December 2022 |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | $ 250 |  | $ 250
Debt Instrument, Effective Interest Rate | 3.43% |  | 3.43%
Senior Notes | Due September 2024 |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | $ 400 |  | $ 400
Debt Instrument, Effective Interest Rate | 3.42% |  | 3.42%
Senior Notes | Due June 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | $ 750 | $ 750 | $ 0
Debt Instrument, Effective Interest Rate | 2.03% |  | 2.03%
Senior Notes | Due June 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | $ 550 | 550 | $ 0
Debt Instrument, Effective Interest Rate | 2.51% |  | 2.51%
Senior Notes | Due June 2030 |  |  |
Debt Instrument [Line Items] |  |  |
Total principal amount | $ 700 | $ 700 | $ 0
Debt Instrument, Effective Interest Rate | 2.81% |  | 2.81%

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