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Marketable Securities | 3 Months Ended
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Dec. 26, 2021
Investments, Debt and Equity Securities [Abstract] |
Marketable Securities | Marketable Securities Our marketable securities were all classified as current and were comprised as follows (in millions):
| December 26, 2021 |  | September 26, 2021 |  |  |  |
Available-for-sale debt securities: |  |  |  |  |  |  |
Corporate bonds and notes | $ | 3,856 |  |  | $ | 4,459 |  |  |  |  |
Mortgage- and asset-backed securities | 137 |  |  | 147 |  |  |  |  |
U.S. Treasury securities and government-related securities | 10 |  |  | 10 |  |  |  |  |
Total available-for-sale debt securities | 4,003 |  |  | 4,616 |  |  |  |  |
Equity securities | 700 |  |  | 682 |  |  |  |  |
Total marketable securities | $ | 4,703 |  |  | $ | 5,298 |  |  |  |  |
The contractual maturities of available-for-sale debt securities were as follows (in millions):
| December 26, 2021
Years to Maturity |
Less than one year | $ | 566 |
One to five years | 3,300 |
No single maturity date | 137 |
Total | $ | 4,003 |
Debt securities with no single maturity date included mortgage- and asset-backed securities.

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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