Investments Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Dec. 25, 2021
Investment Income Debt and Equity Securities [Abstract]
Interest and dividend income	$ 379	$ 256	$ 197
Net realized gain (loss) on investments	134	(2)	33
Investment Income Before Fair Value Adjustment	513	254	230
Fair value adjustment, due to net unrealized gain (loss), on equity securities held at end of year	398	(1,516)	1,109
Net gain on sale of equity securities previously recognized through fair value adjustment	(48)	0	(9)
Investment income	$ 863		$ 1,330
Investment (loss)		$ (1,262)