Accumulated Other Comprehensive Earnings (Losses) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2024	Apr. 01, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances at Beginning of Period	$ (404)	$ (609)
Unrealized gain (loss) on debt securities	(15)	98
Net other comprehensive losses	(15)	98
Balances at End of Period	(419)	(511)
Investments [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances at Beginning of Period	(412)	(618)
Unrealized gain (loss) on debt securities	(15)	98
Net other comprehensive losses	(15)	98
Balances at End of Period	(427)	(520)
Postretirement Benefit Obligation [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balances at Beginning of Period	8	9
Net other comprehensive losses	0	0
Balances at End of Period	$ 8	$ 9