Composition of Certain Financial Statement Items Equity Method and Non-marketable Equity Investments (Details) - USD ($) $ in Millions		Sep. 28, 2025	Sep. 29, 2024
Equity Method and Non-Marketable Equity Investments [Abstract]
Equity method investments		$ 163	$ 154
Non-marketable equity investments	[1]	1,216	1,187
Carrying value of equity method and non-marketable equity investments		1,379	1,341
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Cumulative Amount		394	370
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Cumulative Amount		$ 457	$ 385

[1] Cumulative unrealized gains were $394 million and $370 million at September 28, 2025 and September 29, 2024, respectively. Cumulative unrealized losses, including impairments, were $457 million and $385 million at September 28, 2025 and September 29, 2024, respectively.