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v3.20.2

Financing Arrangements - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended
--- | --- | --- | ---
Jul. 27, 2020 USD ($) | Jun. 30, 2020 USD ($) | Jul. 28, 2017 USD ($) Extension | Jul. 31, 2020 USD ($) | Apr. 24, 2020 USD ($) | Jul. 26, 2019 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |
Issuance of debt, net of issuance costs |  |  |  | $ 2,057,000,000 |  | $ 0
Revolving Credit Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility, amount |  |  | $ 1,000,000,000.0 |  |  |
Credit facility, date expiry |  |  | Dec. 10, 2021 |  |  |
Credit facility, increase in facility |  |  | $ 300,000,000 |  |  |
Credit facility, number of extensions | Extension |  |  | 2 |  |  |
Credit facility, extensions period |  |  | 1 year |  |  |
Credit facility, amounts drawn |  |  |  | 0 |  |
Revolving Credit Facility | Letter Of Credit Sub Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Credit facility, amount |  |  | $ 50,000,000 |  |  |
Commercial Paper |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  |  |  | 150,000,000 | $ 523,000,000 |
Issuance of debt, net of issuance costs |  |  |  | $ 75,000,000 |  |
Weighted-average interest rates |  |  |  | 1.29% | 2.01% |
Proceeds from repayments of debt |  |  |  | $ 76,000,000 |  |
Commercial Paper | Maximum |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  |  | $ 1,000,000,000.0 |  |  |
Debt instrument maturity period |  |  | 397 days | 3 months | 3 months |
Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  |  |  | $ 2,650,000,000 | $ 1,150,000,000 |
Issuance of debt, net of issuance costs |  | $ 2,000,000,000.0 |  |  |  |
Cash redemption premium |  |  |  | 13,000,000 |  |
Write-off of unamortized discount and issuance costs |  |  |  | 1,000,000 |  |
Senior Notes | Other Income (Expense), Net |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Loss on extinguishment of debt |  |  |  | 14,000,000 |  |
Senior Notes | Due June 2027 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  | $ 550,000,000 |  | 550,000,000 | 0 |
Notes issued, interest rate |  | 2.375% |  |  |  |
Senior Notes | Due June 2025 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  | $ 750,000,000 |  | 750,000,000 | 0 |
Notes issued, interest rate |  | 1.875% |  |  |  |
Senior Notes | Due June 2030 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  | $ 700,000,000 |  | 700,000,000 | 0 |
Notes issued, interest rate |  | 2.70% |  |  |  |
Senior Notes | Due June 2021 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  |  |  | 0 | 500,000,000 |
Notes issued, interest rate | 3.375% |  |  |  |  |
Extinguishment of debt amount | $ 513,000,000 |  |  |  |  |
Senior Notes | Due September 2024 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  |  |  | $ 400,000,000 | 400,000,000 |
Notes issued, interest rate |  |  |  | 3.30% |  |
Senior Notes | Due December 2022 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Notes issued, principal amount |  |  |  | $ 250,000,000 | $ 250,000,000 |
Notes issued, interest rate |  |  |  | 3.25% |  |

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