v3.25.4
Cash, cash equivalents and current marketable securities - Cash and Cash Equivalent Composition (Details) - USD ($)
$ in Millions
Dec. 28, 2025
Dec. 29, 2024
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Cash & Cash Equivalents $ 19,709 $ 24,105
Fair value, available-for-sale 2,854 7,216
Current Marketable Securities 393 417
Held-to-maturity Securities    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, held-to-maturity 17,248 17,306
Fair value, held-to-maturity 17,248 17,306
Cash & Cash Equivalents 17,248 17,186
Current Marketable Securities 0 120
Held-to-maturity Securities | Cash    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, held-to-maturity 3,299 2,918
Fair value, held-to-maturity 3,299 2,918
Cash & Cash Equivalents 3,299 2,918
Current Marketable Securities 0 0
Held-to-maturity Securities | Securities Loaned or Sold under Agreements to Repurchase    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, held-to-maturity 7,063 7,100
Fair value, held-to-maturity 7,063 7,100
Cash & Cash Equivalents 7,063 7,100
Current Marketable Securities 0 0
Held-to-maturity Securities | Non-U.S. Sovereign Securities    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, held-to-maturity   120
Fair value, held-to-maturity   120
Cash & Cash Equivalents   0
Current Marketable Securities   120
Held-to-maturity Securities | Money market funds    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, held-to-maturity 5,993 6,123
Fair value, held-to-maturity 5,993 6,123
Cash & Cash Equivalents 5,993 6,123
Current Marketable Securities 0 0
Held-to-maturity Securities | Time deposits    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, held-to-maturity 893 1,045
Fair value, held-to-maturity 893 1,045
Cash & Cash Equivalents 893 1,045
Current Marketable Securities 0 0
Available-for-sale Securities    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Cash & Cash Equivalents 2,461 6,919
Carrying Amount, available-for-sale 2,854 7,215
Available-for-sale, unrealized gain   1
Fair value, available-for-sale 2,854 7,216
Current Marketable Securities 393 297
Available-for-sale Securities | Securities Loaned or Sold under Agreements to Repurchase    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Carrying Amount, available-for-sale   176
Fair value, available-for-sale   176
Available-for-sale Securities | Non-U.S. Sovereign Securities    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Cash & Cash Equivalents 102 83
Carrying Amount, available-for-sale 260  
Fair value, available-for-sale 260  
Current Marketable Securities 158 93
Available-for-sale Securities | U.S. Gov't Securities    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Cash & Cash Equivalents 2,324 6,796
Carrying Amount, available-for-sale 2,365 6,815
Available-for-sale, unrealized gain   1
Fair value, available-for-sale 2,365 6,816
Current Marketable Securities 41 20
Available-for-sale Securities | Corporate debt securities    
Cash, Cash Equivalents, and Short-term Investments [Abstract]    
Cash & Cash Equivalents 35 40
Carrying Amount, available-for-sale 229 224
Fair value, available-for-sale 229 224
Current Marketable Securities $ 194 $ 184