Accumulated Other Comprehensive Earnings (Losses) (Notes)

12 Months Ended

Dec. 31, 2022

Equity [Abstract]

Accumulated Other Comprehensive Earnings (Losses)[Text Block]

(9)    Accumulated Other Comprehensive Earnings (Losses)

A reconciliation of the changes in accumulated other comprehensive earnings (losses) net of income taxes for 2022, 2021 and 2020 is as follows:

	Investments			Postretirement Benefit		Accumulated Other Comprehensive Earnings (Losses)
		(Amounts are in millions)
Balances at December 28, 2019		$	98		(17)		81
Unrealized gain on debt securities		139			—		139
Net realized gain on debt securities reclassified to investment income		(13)			—		(13)
Adjustment to postretirement benefit obligation		—			(6)		(6)
Net other comprehensive earnings (losses)		126			(6)		120
Balances at December 26, 2020		224			(23)		201
Unrealized loss on debt securities		(201)			—		(201)
Net realized gain on debt securities reclassified to investment income		(16)			—		(16)
Adjustment to postretirement benefit obligation		—			11		11
Net other comprehensive (losses) earnings		(217)			11		(206)
Balances at December 25, 2021		7			(12)		(5)
Unrealized loss on debt securities		(626)			—		(626)
Net realized loss on debt securities reclassified to investment income		1			—		1
Adjustment to postretirement benefit obligation		—			21		21
Net other comprehensive (losses) earnings		(625)			21		(604)
Balances at December 31, 2022		$	(618)		9		(609)