v3.19.1

Borrowings (Schedule of Long-Term Debt) (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Apr. 27, 2019 | Jul. 28, 2018
Debt Instrument [Line Items] |  |
Total | $ 20,500 | $ 25,750
Unaccreted discount/issuance costs | (103) | (116)
Hedge accounting fair value adjustments | 18 | (65)
Total | 20,415 | 25,569
Current portion of long-term debt | 4,494 | 5,238
Long-term debt | 15,921 | 20,331
Floating Rate Notes 3-month Libor Plus 0.50% Due March 2019 |  |
Debt Instrument [Line Items] |  |
Amount | $ 0 | $ 500
Effective Rate | 0.00% | 2.86%
Floating Rate Notes 3-month Libor Plus 0.34% Due September 2019 |  |
Debt Instrument [Line Items] |  |
Amount | $ 500 | $ 500
Effective Rate | 3.01% | 2.71%
Fixed-Rate Notes, 4.95%, Due February 2019 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 4.95% |
Amount | $ 0 | $ 2,000
Effective Rate | 0.00% | 5.17%
Fixed-Rate Notes, 1.60%, Due February 2019 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 1.60% |
Amount | $ 0 | $ 1,000
Effective Rate | 0.00% | 1.67%
Fixed-Rate Notes, 2.125%, Due March 2019 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.125% |
Amount | $ 0 | $ 1,750
Effective Rate | 0.00% | 2.71%
Fixed-Rate Notes, 1.40%, Due September 2019 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 1.40% |
Amount | $ 1,500 | $ 1,500
Effective Rate | 1.48% | 1.48%
Fixed-Rate Notes, 4.45%, Due January 2020 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 4.45% |
Amount | $ 2,500 | $ 2,500
Effective Rate | 4.84% | 4.52%
Fixed-Rate Notes, 2.45%, Due June 2020 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.45% |
Amount | $ 1,500 | $ 1,500
Effective Rate | 2.54% | 2.54%
Fixed-Rate Notes, 2.20%, Due February 2021 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.20% |
Amount | $ 2,500 | $ 2,500
Effective Rate | 2.30% | 2.30%
Fixed-Rate Notes, 2.90%, Due March 2021 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.90% |
Amount | $ 500 | $ 500
Effective Rate | 3.25% | 2.86%
Fixed-Rate Notes, 1.85%, Due September 2021 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 1.85% |
Amount | $ 2,000 | $ 2,000
Effective Rate | 1.90% | 1.90%
Fixed-Rate Notes, 3.00 %, Due June 2022 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 3.00% |
Amount | $ 500 | $ 500
Effective Rate | 3.51% | 3.11%
Fixed-Rate Notes, 2.60%, Due February, 2023 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.60% |
Amount | $ 500 | $ 500
Effective Rate | 2.68% | 2.68%
Fixed-Rate Notes, 2.20%, Due September 2023 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.20% |
Amount | $ 750 | $ 750
Effective Rate | 2.27% | 2.27%
Fixed-Rate Notes, 3.625%, Due March 2024 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 3.625% |
Amount | $ 1,000 | $ 1,000
Effective Rate | 3.37% | 2.98%
Fixed-Rate Notes, 3.50%, Due June 2025 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 3.50% |
Amount | $ 500 | $ 500
Effective Rate | 3.67% | 3.27%
Fixed-Rate Notes, 2.95%, Due February, 2026 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.95% |
Amount | $ 750 | $ 750
Effective Rate | 3.01% | 3.01%
Fixed-Rate Notes, 2.50%, Due September 2026 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 2.50% |
Amount | $ 1,500 | $ 1,500
Effective Rate | 2.55% | 2.55%
Fixed-Rate Notes, 5.90%, Due February 2039 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 5.90% |
Amount | $ 2,000 | $ 2,000
Effective Rate | 6.11% | 6.11%
Fixed-Rate Notes, 5.50%, Due January 2040 |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 5.50% |
Amount | $ 2,000 | $ 2,000
Effective Rate | 5.67% | 5.67%
LIBOR | Floating Rate Notes 3-month Libor Plus 0.50% Due March 2019 |  |
Debt Instrument [Line Items] |  |
Three-month LIBOR plus this percentage | 0.50% |
LIBOR | Floating Rate Notes 3-month Libor Plus 0.34% Due September 2019 |  |
Debt Instrument [Line Items] |  |
Three-month LIBOR plus this percentage | 0.34% |

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