Available for Sale Debt Securities Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 30, 2024	Dec. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 12,277	$ 11,653
Unrealized Gains	14	25
Unrealized Losses	586	577
Fair Value	11,705	11,101
Taxable bonds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	12,093	11,467
Unrealized Gains	14	23
Unrealized Losses	584	574
Fair Value	11,523	10,916
Restricted investments [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	184	186
Unrealized Gains	0	2
Unrealized Losses	2	3
Fair Value	$ 182	$ 185