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Cash, cash equivalents and current marketable securities (Tables) | 12 Months Ended
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Dec. 29, 2024
Cash and Cash Equivalents [Abstract] |
Cash and Cash Equivalent Composition | At the end of the fiscal year 2024 and 2023, cash, cash equivalents and current marketable securities comprised:
(Dollars in Millions) |  | 2024
| Carrying Amount |  | Unrecognized Gain |  |  |  | Estimated Fair Value | Cash & Cash Equivalents |  | Current Marketable Securities
Cash |  | $2,918 |  | — |  |  |  | 2,918 |  | 2,918 |  | —
Non-U.S. Sovereign Securities(1) |  | 120 |  | — |  |  |  | 120 |  | — |  | 120
U.S. Reverse repurchase agreements |  | 7,100 |  | — |  |  |  | 7,100 |  | 7,100 |  | —
Money market funds |  | 6,123 |  | — |  |  |  | 6,123 |  | 6,123 |  | —
Time deposits(1) |  | 1,045 |  | — |  |  |  | 1,045 |  | 1,045 |  | —
Subtotal |  | $17,306 |  | — |  |  |  | 17,306 |  | 17,186 |  | 120
U.S. Gov't Securities |  | $6,815 |  | 1 |  |  |  | 6,816 |  | 6,796 |  | 20
Other Sovereign Securities |  | 176 |  | — |  |  |  | 176 |  | 83 |  | 93
Corporate and other debt securities |  | 224 |  | — |  |  |  | 224 |  | 40 |  | 184
Subtotal available for sale(2) |  | $7,215 |  | 1 |  |  |  | 7,216 |  | 6,919 |  | 297
Total cash, cash equivalents and current marketable securities |  |  |  |  |  |  |  |  |  | $24,105 |  | 417
(Dollars in Millions) |  | 2023
| Carrying Amount |  |  |  | Unrecognized Loss |  | Estimated Fair Value | Cash & Cash Equivalents |  | Current Marketable Securities
Cash |  | $3,340 |  |  |  | — |  | 3,340 |  | 3,340 |  | —
Non-U.S. Sovereign Securities(1) |  | 522 |  |  |  | — |  | 522 |  | 174 |  | 348
U.S. Reverse repurchase agreements |  | 4,377 |  |  |  | — |  | 4,377 |  | 4,377 |  | —
Corporate debt securities(1) |  | 338 |  |  |  | — |  | 338 |  | 189 |  | 149
Money market funds |  | 4,814 |  |  |  | — |  | 4,814 |  | 4,814 |  | —
Time deposits(1) |  | 662 |  |  |  | — |  | 662 |  | 662 |  | —
Subtotal |  | 14,053 |  |  |  | — |  | 14,053 |  | 13,556 |  | 497
U.S. Gov't Securities |  | $8,562 |  |  |  | — |  | 8,562 |  | 8,259 |  | 303
U.S. Gov't Agencies |  | 71 |  |  |  | (1) |  | 70 |  | — |  | 70
Other Sovereign Securities |  | 5 |  |  |  | — |  | 5 |  | 1 |  | 4
Corporate and other debt securities |  | 237 |  |  |  |  |  | 237 |  | 43 |  | 194
Subtotal available for sale(2) |  | $8,875 |  |  |  | (1) |  | 8,874 |  | 8,303 |  | 571
Total cash, cash equivalents and current marketable securities |  |  |  |  |  |  |  |  |  | $21,859 |  | 1,068
(1)Held to maturity investments are reported at amortized cost and realized gains or losses are reported in earnings. (2)Available for sale debt securities are reported at fair value with unrealized gains and losses reported net of taxes in other comprehensive income.
Contractual Maturities of Available for Sale Securities | The contractual maturities of the available for sale debt securities at December 29, 2024 are as follows:
(Dollars in Millions) |  | Cost Basis |  | Fair Value
Due within one year |  | $7,204 |  | 7,205
Due after one year through five years |  | 11 |  | 11
Due after five years through ten years |  | — |  | —
Total debt securities |  | $7,215 |  | 7,216

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