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Debt - Summary of Term Debt (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Jun. 26, 2021 | Sep. 26, 2020
Debt Instrument [Line Items] |  |
Total term debt | $ 113,193 | $ 106,078
Unamortized premium/(discount) and issuance costs, net | (360) | (314)
Hedge accounting fair value adjustments | 958 | 1,676
Less: Current portion of term debt | (8,039) | (8,773)
Total non-current portion of term debt | 105,752 | 98,667
2013 – 2020 debt issuances | Floating-rate notes |  |
Debt Instrument [Line Items] |  |
Total term debt | $ 1,750 | $ 2,250
Debt instrument, maturity year (calendar), start | 2022 |
Debt instrument, maturity year (calendar), end | 2022 |
2013 – 2020 debt issuances | Floating-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 0.51% | 0.60%
2013 – 2020 debt issuances | Floating-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, effective interest rate | 0.66% | 1.39%
2013 – 2020 debt issuances | Fixed-rate notes |  |
Debt Instrument [Line Items] |  |
Total term debt | $ 97,443 | $ 103,828
Debt instrument, maturity year (calendar), start | 2021 |
Debt instrument, maturity year (calendar), end | 2060 |
2013 – 2020 debt issuances | Fixed-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 0.00% |
Debt instrument, effective interest rate | 0.03% | 0.03%
2013 – 2020 debt issuances | Fixed-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 4.65% |
Debt instrument, effective interest rate | 4.78% | 4.78%
2021 debt issuance | Fixed-rate notes |  |
Debt Instrument [Line Items] |  |
Total term debt | $ 14,000 | $ 0
Debt instrument, maturity year (calendar), start | 2026 |
Debt instrument, maturity year (calendar), end | 2061 |
Debt instrument, effective interest rate |  | 0.00%
2021 debt issuance | Fixed-rate notes | Minimum |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 0.70% |
Debt instrument, effective interest rate | 0.75% |
2021 debt issuance | Fixed-rate notes | Maximum |  |
Debt Instrument [Line Items] |  |
Debt instrument, stated interest rate | 2.80% |
Debt instrument, effective interest rate | 2.81% |

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