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Cash, cash equivalents and current marketable securities (Tables)
 12 Months Ended
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—2,9182,918—
Non-U.S. Sovereign Securities(1)
120—120—120
U.S. Reverse repurchase agreements7,100—7,1007,100—
Money market funds6,123—6,1236,123—
Time deposits(1)
1,045—1,0451,045—
Subtotal $17,306—17,30617,186120
U.S. Gov't Securities$6,81516,8166,79620
Other Sovereign Securities176—1768393
Corporate and other debt securities224—22440184
Subtotal available for sale(2)
$7,21517,2166,919297
Total cash, cash equivalents and current marketable securities
$24,105417
(Dollars in Millions)2023
Carrying AmountUnrecognized
Loss		Estimated Fair ValueCash & Cash EquivalentsCurrent Marketable Securities
Cash$3,340—3,3403,340—
Non-U.S. Sovereign Securities(1)
522—522174348
U.S. Reverse repurchase agreements4,377—4,3774,377—
Corporate debt securities(1)
338—338189149
Money market funds4,814—4,8144,814—
Time deposits(1)
662—662662—
Subtotal 14,053—14,05313,556497
U.S. Gov't Securities$8,562—8,5628,259303
U.S. Gov't Agencies71(1)70—70
Other Sovereign Securities5—514
Corporate and other debt securities23723743194
Subtotal available for sale(2)
$8,875(1)8,8748,303571
Total cash, cash equivalents and current marketable securities
$21,8591,068
(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 BasisFair Value
Due within one year$7,2047,205
Due after one year through five years1111
Due after five years through ten years——
Total debt securities$7,2157,216