v3.26.1
Fair value measurements - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 28, 2025
Mar. 29, 2026
Debt Securities, Available-for-sale [Abstract]    
Available-for-sale Securities - Estimated Fair Value $ 2,854 $ 6,675
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents 19,709 21,688
Marketable securities 393 363
Total cash, cash equivalents and current marketable securities, Carrying Amount   22,051
Total cash, cash equivalents and current marketable securities, Estimated Fair Value   22,051
Excess of carrying value over fair value of debt $ 1,700  
Held-to-maturity Securities    
Debt Securities, Held-to-maturity [Abstract]    
Held-to-maturity Securities - Carrying Amount   15,376
Held-to-maturity Securities - Estimated Fair Value   15,376
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   15,376
Marketable securities   0
Held-to-maturity Securities | Cash    
Debt Securities, Held-to-maturity [Abstract]    
Held-to-maturity Securities - Carrying Amount   3,310
Held-to-maturity Securities - Estimated Fair Value   3,310
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   3,310
Marketable securities   0
Held-to-maturity Securities | U.S. reverse repurchase agreements    
Debt Securities, Held-to-maturity [Abstract]    
Held-to-maturity Securities - Carrying Amount   6,253
Held-to-maturity Securities - Estimated Fair Value   6,253
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   6,253
Marketable securities   0
Held-to-maturity Securities | Money market funds    
Debt Securities, Held-to-maturity [Abstract]    
Held-to-maturity Securities - Carrying Amount   5,089
Held-to-maturity Securities - Estimated Fair Value   5,089
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   5,089
Marketable securities   0
Held-to-maturity Securities | Time deposits(1)    
Debt Securities, Held-to-maturity [Abstract]    
Held-to-maturity Securities - Carrying Amount   724
Held-to-maturity Securities - Estimated Fair Value   724
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   724
Marketable securities   0
Available-for-sale Securities    
Debt Securities, Available-for-sale [Abstract]    
Available-for-sale Securities - Carrying Amount   6,675
Available-for-sale Securities - Estimated Fair Value   6,675
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   6,312
Marketable securities   363
Available-for-sale Securities | U.S. Gov’t securities    
Debt Securities, Available-for-sale [Abstract]    
Available-for-sale Securities - Carrying Amount   6,225
Available-for-sale Securities - Estimated Fair Value   6,225
Available-for-sale Securities | Non-U.S. sovereign securities    
Debt Securities, Available-for-sale [Abstract]    
Available-for-sale Securities - Carrying Amount   234
Available-for-sale Securities - Estimated Fair Value   234
Available-for-sale Securities | Corporate debt securities(1)    
Debt Securities, Available-for-sale [Abstract]    
Available-for-sale Securities - Carrying Amount   216
Available-for-sale Securities - Estimated Fair Value   216
Available-for-sale Securities | Non-U.S. sovereign securities    
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   76
Marketable securities   158
Available-for-sale Securities | Corporate debt securities(1)    
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   29
Marketable securities   187
Available-for-sale Securities | U.S. Gov’t securities    
Debt Securities, Available-for-sale and Held-to-maturity [Abstract]    
Cash and Cash Equivalents   6,207
Marketable securities   $ 18