Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Available For Sale Debt Securities [Table Text Block]

Following is a summary of debt securities as of December 31, 2022 and December 25, 2021:

	Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(Amounts are in millions)
2022
Taxable bonds	$	9,705		6		830	8,881
Tax exempt bonds	37			—		—	37
Restricted investments	170			—		4	166
	$	9,912		6		834	9,084
2021
Taxable bonds	$	9,644		109		108	9,645
Tax exempt bonds	269			2		—	271
Restricted investments	171			8		1	178
	$	10,084		119		109	10,094

Amortized Cost and Fair Value of Available for Sale Debt Securities by Expected Maturity [Table Text Block]

The cost and fair value of debt securities by expected maturity as of December 31, 2022 and December 25, 2021 are as follows:

	2022			2021
	Cost		Fair Value	Cost	Fair Value
			(Amounts are in millions)
Due in one year or less	$	570	566	876	883
Due after one year through five years	8,355		7,661	6,353	6,404
Due after five years through ten years	985		855	2,852	2,804
Due after ten years	2		2	3	3
	$	9,912	9,084	10,084	10,094

Temporarily Impaired Available for Sale Debt Securities by Time Period Impaired [Table Text Bock]

Following is a summary of debt securities with other unrealized losses by the time period impaired as of December 31, 2022 and December 25, 2021:

	Less Than 12 Months				12 Months or Longer			Total
	Fair Value		Unrealized Losses		Fair Value	Unrealized Losses		Fair Value	Unrealized Losses
	(Amounts are in millions)
2022
Taxable bonds	$	3,705		199	4,627		631	8,332		830
Restricted investments	151			2	15		2	166		4
	$	3,856		201	4,642		633	8,498		834
2021
Taxable bonds	$	4,225		72	1,132		36	5,357		108
Restricted investments	17			1	—		—	17		1
	$	4,242		73	1,132		36	5,374		109

Investment Income (Loss) [Table Text Block]

Following is a summary of investment income (loss) for 2022, 2021 and 2020:

	2022			2021		2020
	(Amounts are in millions)
Interest and dividend income		$	256		197		199
Net realized (loss) gain on investments		(2)			33		397
		254			230		596
Fair value adjustment, due to net unrealized (loss) gain, on equity securities held at end of year		(1,516)			1,109		555
Net gain on sale of equity securities previously recognized through fair value adjustment		—			(9)		(176)
		$	(1,262)		1,330		975