Fair Values of Financial Assets and Liabilities (Detail) $ / shares in Units, $ in Millions	3 Months Ended
Mar. 20, 2021 USD ($) $ / shares	Dec. 26, 2020 USD ($)
Derivatives, Fair Value [Line Items]
Senior Notes	$ 200	$ 200
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	1	2
Short-term Investments	964	1,366
Derivative Asset, Fair Value, Gross Asset	132	79
Derivative Liability, Fair Value, Gross Liability	387	393
Total Financial Assets At Fair Value	513	328
Total Financial Liabilities At Fair Value	1,722	1,731
Derivatives not designated as hedging instruments:
Collateral Already Posted, Aggregate Fair Value	0
Business Combinations [Abstract]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	1,100
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	847
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances	861
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	$ 14
Duration of contingent consideration arrangement	15 years
Business Combination, Contingent Consideration, Asset	$ 0	0
Business Combination, Contingent Consideration, Liability	847	861
Debt Instrument, Fair Value Disclosure	46,000	50,000
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease)	14
Debt and Equity Securities, Unrealized Gain (Loss)	$ 108
Debt and Equity Securities, Unrealized Gain (Loss) - After Tax Per Share \| $ / shares	$ 0.06
Debt and Equity Securities, Unrealized Gain (Loss) - After Tax	$ 82
Derivatives Designated As Cash Flow Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Derivative Instrument Assets at Fair Value	94	54
Derivatives Designated As Cash Flow Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Cash Flow Hedge Derivative Instrument Liabilities at Fair Value	372	378
Derivatives Not Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value	37	23
Derivatives Not Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Other Derivatives Not Designated as Hedging Instruments Liabilities at Fair Value	15	15
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Fair Value Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Fair Value Hedge Asset at Fair Value	1	2
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Fair Value Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Interest Rate Fair Value Hedge Liability at Fair Value	0	0
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Cash Flow Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Asset at Fair Value	7	9
Interest Rate Cash Flow Hedge Asset at Fair Value	28	13
Price Risk Cash Flow Hedge Asset, at Fair Value	59	32
Fair Value, Inputs, Level 2 [Member] \| Derivatives Designated As Cash Flow Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Cash Flow Hedge Liability at Fair Value	68	71
Interest Rate Cash Flow Hedge Liability at Fair Value	304	307
Price Risk Cash Flow Hedge Liability, at Fair Value	0	0
Fair Value, Inputs, Level 2 [Member] \| Derivatives Not Designated As Hedging Instruments Assets [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	5	4
Price Risk Derivative Instruments Not Designated as Hedging Instruments Asset, at Fair Value	32	19
Fair Value, Inputs, Level 2 [Member] \| Derivatives Not Designated As Hedging Instruments Liabilities [Member]
Derivatives, Fair Value [Line Items]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value	5	8
Price Risk Derivative Instruments Not Designated as Hedging Instruments Liability, at Fair Value	10	7
Fair Value, Inputs, Level 2 [Member] \| Liability [Member]
Derivatives, Fair Value [Line Items]
Prepaid Forward Asset Fair Value	0	0
Deferred Compensation Liability, Current and Noncurrent	488	477
Fair Value, Inputs, Level 2 [Member] \| Assets [Member]
Derivatives, Fair Value [Line Items]
Prepaid Forward Asset Fair Value	17	18
Deferred Compensation Liability, Current and Noncurrent	0	0
Liability [Member] \| Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Short-term Investments	0	0
Business Combinations [Abstract]
Equity Securities, FV-NI	0	0
Assets [Member] \| Fair Value, Inputs, Level 1 [Member]
Derivatives, Fair Value [Line Items]
Short-term Investments	240	231
Business Combinations [Abstract]
Equity Securities, FV-NI	$ 124	$ 0
Fair Value, Inputs, Level 3, estimated range of payments, low [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	40,000,000
Fair Value, Inputs, Level 3, estimated range of payments, high [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	110,000,000
Fair Value, Inputs, Level 3, estimated range of payments, average [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	70,000,000
Fair Value, Inputs, Level 3, estimated range of probabilities of acceleration, low [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.03
Fair Value, Inputs, Level 3, estimated range of probabilities of acceleration, high [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.25
Fair Value, Inputs, Level 3, weighted average payment period [Member]
Business Combinations [Abstract]
Duration of contingent consideration arrangement	3 years
Fair Value, Inputs, Level 3, estimated range of discount rates, low [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.01
Fair Value, Inputs, Level 3, estimated range of discount rates, high [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.05
Fair Value, Inputs, Level 3, weighted average discount rate [Member]
Business Combinations [Abstract]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.03

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Prepaid Forward Asset Fair Value

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Fair value of all asset derivatives designated as cash flow hedging instruments.

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Fair value of all liability derivatives designated as cash flow hedging instruments.

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements. Represents currently earned compensation under compensation arrangements that is not actually paid until a later date.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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

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Amount of issuances of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value as of the balance sheet date of all foreign currency derivative assets designated as cash flow hedging instruments.

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Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk, remaining after discontinued hedge.

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