Derivative Financial Instruments (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	$ 1,427	$ 2,235
Effect of Fair Value Hedges on Results of Operations [Abstract]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	723	(817)	$ (1,071)
Gross Notional Amounts [Abstract]
Derivative, notional amount	55,750	47,696	40,036
Offsetting Derivative Assets [Abstract]
Derivative Assets Subject To Master Netting Arrangements, Gross Amounts Offset In The Balance Sheet	0	0
Derivative Assets, Fair Value Disclosure	1,427	2,235
Derivative Asset, Not Offset, Policy Election Deduction	(332)	(264)
Derivative, Collateral, Obligation to Return Cash	(986)	(1,904)
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	109	67
Reverse Repurchase Agreements, Gross Amounts Recognized	1,595	1,900
Reverse Repurchase Agreements, Gross Amounts Offset In The Balance Sheet	0	0
Securities Purchased under Agreements to Resell	1,595	1,900
Securities Purchased under Agreements to Resell, Not Offset, Policy Election Deduction	0	0
Reverse Repurchase Agreements, Gross Amounts Not Offset In The Balance Sheet - Financial Instruments	(1,595)	(1,900)
Securities Purchased under Agreements to Resell, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	0	0
Total Assets, Gross Amounts Recognized	3,022	4,135
Total Assets, Gross Amounts Offset In The Balance Sheet	0	0
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed	3,022	4,135
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Not Offset, Policy Election Deduction	(332)	(264)
Total Assets, Gross Amounts Not Offset In The Balance Sheet - Cash and Non-Cash Collateral Received Or Pledged	(2,581)	(3,804)
Derivative Asset, Securities Purchased under Agreements to Resell, Securities Borrowed, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	109	67
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	392	711
Derivative Liabilities Subject To Master Netting Arrangements, Gross Amounts Offset In The Balance Sheet	0	0
Derivative Financial Instruments, Liabilities, Fair Value Disclosure	392	711
Derivative Liability, Not Offset, Policy Election Deduction	(332)	(264)
Derivative, Collateral, Right to Reclaim Cash	(60)	(447)
Derivative Liability, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election	0	0
Designated as Hedging Instrument [Member] \| Interest and other, net [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gains (Losses) Recognized in Income on Derivatives	0	0	0
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	0	0	0
Not Designated as Hedging Instrument [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gains (Losses) Recognized in Income on Derivatives	1,068	(378)	469
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	1,068	(378)	469
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	0
Assets [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	1,435	2,242
Assets [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	854	2,049
Assets [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	581	193
Liabilities [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	529	815
Liabilities [Member] \| Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	163	2
Liabilities [Member] \| Not Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	366	813
Foreign currency contracts [Member]
Gross Notional Amounts [Abstract]
Derivative, notional amount	38,024	31,209	23,981
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax	(434)	806	(11)
Foreign currency contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Interest and other, net [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gains (Losses) Recognized in Income on Derivatives	677	(572)	204
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	677	(572)	204
Foreign currency contracts [Member] \| Assets [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	80	551
Foreign currency contracts [Member] \| Assets [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	475	142
Foreign currency contracts [Member] \| Liabilities [Member] \| Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	163	2
Foreign currency contracts [Member] \| Liabilities [Member] \| Not Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	297	685
Interest Rate Contracts [Member]
Effect of Fair Value Hedges on Results of Operations [Abstract]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(723)	817	1,071
Gross Notional Amounts [Abstract]
Derivative, notional amount	15,209	14,461	14,302
Interest Rate Contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Interest and other, net [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gains (Losses) Recognized in Income on Derivatives	31	(90)	(32)
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	31	(90)	(32)
Interest Rate Contracts [Member] \| Assets [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	774	1,498
Interest Rate Contracts [Member] \| Assets [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	26	3
Interest Rate Contracts [Member] \| Liabilities [Member] \| Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	0	0
Interest Rate Contracts [Member] \| Liabilities [Member] \| Not Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	65	128
Other contracts [Member]
Gross Notional Amounts [Abstract]
Derivative, notional amount	2,517	2,026	1,753
Other contracts [Member] \| Not Designated as Hedging Instrument [Member] \| Various [Member]
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gains (Losses) Recognized in Income on Derivatives	360	284	297
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	360	284	297
Other contracts [Member] \| Assets [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Asset, Fair Value, Gross Asset	80	48
Other contracts [Member] \| Liabilities [Member] \| Not Designated as Hedging Instrument [Member]
Offsetting Derivative Liabilities [Abstract]
Total Liabilities, Gross Amounts Recognized	4	0
Interest Rate Swaps [Member] \| Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, amount discontinued			7,100
Gain to be amortized over remaining life of debt			$ 111
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Gains (Losses) Recognized in Income on Derivatives	(775)	(1,498)
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	(775)	(1,498)
Interest Rate Swaps [Member] \| Long-term Debt [Member] \| Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Amount of Hedged Item	12,000	12,000
Derivative Assets (Liabilities), at Fair Value, Net, by Balance Sheet Classification [Abstract]
Derivative, Fair Value, Net	(12,772)	(13,495)
Gains (Losses) Recognized in Income on Derivatives	(811)	(1,565)
Derivative Instruments Not Designation as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income on Derivatives	$ (811)	$ (1,565)

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Derivative Asset, Securities Purchased Under Agreements To Resell, Securities Borrowed, Collateral, Obligation To Return Cash Or Non-Cash

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Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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Amount of obligation to return cash collateral under master netting arrangements that have not been offset against derivative assets.

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