Composition of Certain Financial Statement Items Equity Method and Non-marketable Equity Investments (Details) - USD ($) $ in Millions		Sep. 27, 2026	Sep. 28, 2025
Equity Method and Non-Marketable Equity Investments [Abstract]
Equity method investments		$ 408	$ 163
Non-marketable equity investments	[1]	1,574	1,216
Carrying value of equity method and non-marketable equity investments		1,982	1,379
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount		548	394
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount		$ 395	$ 457

[1] Cumulative unrealized gains were $548 million and $394 million at September 27, 2026 and September 28, 2025, respectively. Cumulative unrealized losses, including impairments, were $395 million and $457 million at September 27, 2026 and September 28, 2025, respectively.