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Financial Instruments (Details) € in Millions, $ in Millions | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 25, 2020 USD ($) | Dec. 27, 2019 USD ($) | Sep. 25, 2020 USD ($) | Dec. 25, 2020 EUR (€) | Dec. 25, 2020 USD ($) | Sep. 25, 2020 EUR (€) | Sep. 25, 2020 USD ($)
Cash flow hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Notional amount | € |  |  |  | € 700 |  | € 700 |
Interest paid in foreign currency, fixed interest rate |  |  |  | 3.50% | 3.50% |  |
Interest received in U.S. dollars, weighted-average fixed interest rate |  |  |  | 5.34% | 5.34% |  |
Gains (losses) recorded in other comprehensive income (loss) | $ (4) | $ 4 |  |  |  |  |
Gains (losses) excluded from the hedging relationship | (40) | (22) |  |  |  |  |
Cash flow hedges | Forward starting interest rate swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 450 |  | $ 450
Gains (losses) recorded in other comprehensive income (loss) | 13 | 10 |  |  |  |  |
Cash flow hedges | Commodity swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Notional amount |  |  |  |  | 321 |  | 312
Gains (losses) recorded in other comprehensive income (loss) | 37 | 19 |  |  |  |  |
Gains (losses) reclassified from accumulated other comprehensive income (loss) into cost of sales | 15 | (1) |  |  |  |  |
Net investment hedges | Intercompany loans and external borrowings |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Notional amount of non-derivative instruments | 3,820 |  | $ 3,511 |  |  |  |
Foreign currency exchange losses on intercompany loans and external borrowings | (168) | (65) |  |  |  |  |
Net investment hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 1,957 |  | 1,664
Interest paid in foreign currency, fixed interest rate |  |  |  | 0.00% | 0.00% |  |
Interest received in U.S. dollars, weighted-average fixed interest rate |  |  |  | 2.03% | 2.03% |  |
Losses on cross-currency swap contracts designated as hedges of net investment | $ (85) | $ (33) |  |  |  |  |
Prepaid expenses and other current assets | Cash flow hedges | Commodity swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Asset Positions |  |  |  |  | $ 56 |  | 41
Prepaid expenses and other current assets | Net investment hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Asset Positions |  |  |  |  |  |  | 1
Other assets | Cash flow hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Asset Positions |  |  |  |  |  |  | 1
Other assets | Cash flow hedges | Forward starting interest rate swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Asset Positions |  |  |  |  | 3 |  |
Other assets | Cash flow hedges | Commodity swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Asset Positions |  |  |  |  | 3 |  | 3
Other assets | Net investment hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Asset Positions |  |  |  |  |  |  | 3
Accrued and other current liabilities | Cash flow hedges | Commodity swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Liability Positions |  |  |  |  | 1 |  | 2
Accrued and other current liabilities | Net investment hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Liability Positions |  |  |  |  | 42 |  | 6
Other liabilities | Cash flow hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Liability Positions |  |  |  |  | 52 |  | 9
Other liabilities | Cash flow hedges | Forward starting interest rate swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Liability Positions |  |  |  |  | 54 |  | 64
Other liabilities | Cash flow hedges | Commodity swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Liability Positions |  |  |  |  |  |  | 1
Other liabilities | Net investment hedges | Cross-currency swap contracts |  |  |  |  |  |  |
Financial Instruments |  |  |  |  |  |  |
Fair Value of Liability Positions |  |  |  |  | $ 56 |  | $ 16

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