Financial Instruments - Celsius and Other AFS (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 21, 2026	Mar. 22, 2025	Dec. 27, 2025	Dec. 28, 2024
Celsius & Other AFS
Impairment Losses, Investments, Available-for-Sale Securities1	$ 0	$ 0
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax	745	430
Total, AFS debt securities
Celsius & Other AFS
Debt Securities, Available-for-Sale	1,998	1,130
Other, AFS debt securities
Celsius & Other AFS
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset (Liability), Gain (Loss), OCI	$ (33)	(14)
Significant unobservable input used in level 3 fair value measurement - Other AFS, discount rate assumption	8.30%		8.30%
Debt Securities, Available-for-Sale	$ 242	242	$ 275	$ 256
Celsius, AFS debt security
Celsius & Other AFS
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)	$ (14)	(7)
Significant unobservable input used in level 3 fair value measurement - Celsius	8.50%		8.50%
Significant unobservable input used in level 3 fair value measurement - Celsius, probability assumption	80.00%		80.00%
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset (Liability), Gain (Loss), OCI	$ (82)	110
Debt Securities, Available-for-Sale	$ 1,756	$ 888	$ 1,852	$ 785

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset (liability) measured at fair value on recurring basis using unobservable input (level 3).

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