Derivative Financial Instruments (Detail) - USD ($) $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016	Dec. 31, 2016
Notional Disclosures [Abstract]
Derivative, Notional Amount	$ 34,747	$ 30,270	$ 33,528
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	357		433
Fair value of derivative liabilities	499		588
Offsetting Derivative Assets [Abstract]
Derivative Assets Subject To Master Netting Arrangements, Gross Amounts Offset In The Balance Sheet	0		0
Derivative Assets Subject To Master Netting Arrangements, Net Amounts Presented In The Balance Sheet	357		433
Derivative Assets Subject To Master Netting Arrangements, Gross Amounts Not Offset In The Balance Sheet - Financial Instruments	(243)		(368)
Derivative Assets Subject To Master Netting Arrangements, Gross Amounts Not Offset In The Balance Sheet - Cash And Non-Cash Collateral Received Or Pledged	(82)		(42)
Derivative Assets Subject To Master Netting Arrangements, Net Amount	32		23
Reverse Repurchase Agreements, Gross Amounts Recognized	1,648		1,018
Reverse Repurchase Agreements, Gross Amounts Offset In The Balance Sheet	0		0
Reverse Repurchase Agreements, Net Amounts Presented In The Balance Sheet	1,648		1,018
Reverse Repurchase Agreements, Gross Amounts Not Offset In The Balance Sheet - Financial Instruments	0		0
Reverse Repurchase Agreements, Gross Amounts Not Offset In The Balance Sheet - Cash And Non-Cash Collateral Received Or Pledged	(1,648)		(1,018)
Reverse Repurchase Agreements, Net Amount	0		0
Total Assets, Gross Amounts Recognized	2,005		1,451
Total Assets, Gross Amounts Offset In The Balance Sheet	0		0
Total Assets, Net Amounts Presented In The Balance Sheet	2,005		1,451
Total Assets, Gross Amounts Not Offset In The Balance Sheet - Financial Instruments	(243)		(368)
Total Assets, Gross Amounts Not Offset In The Balance Sheet - Cash and Non-Cash Collateral Received Or Pledged	(1,730)		(1,060)
Total Assets, Net Amount	32		23
Offsetting Derivative Liabilities [Abstract]
Derivative Liabilities Subject To Master Netting Arrangements, Gross Amounts Offset In The Balance Sheet	0		0
Derivative Liabilities Subject To Master Netting Arrangements, Net Amounts Presented In The Balance Sheet	499		588
Derivative Liabilities Subject To Master Netting Arrangements, Gross Amounts Offset In The Balance Sheet - Financial Instruments	(243)		(368)
Derivative Liabilities Subject To Master Netting Arrangements, Gross Amounts Offset In The Balance Sheet - Cash And Non-Cash Collateral Received Or Pledged	(240)		(201)
Derivative Liabilities Subject To Master Netting Arrangements, Net Amount	16		19
Total Liabilities, Gross Amounts Recognized	499		588
Total Liabilities, Gross Amounts Offset In The Balance Sheet	0		0
Total Liabilities, Net Amounts Presented In The Balance Sheet	499		588
Total Liabilities, Gross Amounts Not Offset In The Balance Sheet - Financial Instruments	(243)		(368)
Total Liabilities, Gross Amounts Not Offset In The Balance Sheet - Cash and Non-Cash Collateral Received Or Pledged	(240)		(201)
Total Liabilities, Net Amount	16		19
Effect of Fair Value Hedges on Results of Operations [Abstract]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	14	(162)
Net Change In Unrealized Gain Loss Recognized In Income Statement On Fair Value Hedging Instruments And On Hedged Item In Fair Value Hedge	0	0
Not Designated as Hedging Instrument [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income On Derivatives	(104)	(234)
Fair Value Hedging [Member]
Effect of Fair Value Hedges on Results of Operations [Abstract]
Derivative, Net Hedge Ineffectiveness Gain (Loss)	0	0
Assets
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	368		422
Assets | Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	175		24
Assets | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	193		398
Liabilities
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	527		583
Liabilities | Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	294		439
Liabilities | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	233		144
Foreign currency contracts
Notional Disclosures [Abstract]
Derivative, Notional Amount	18,575	17,520	17,960
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net [Abstract]
Gains (Losses) Recognized in Other Comprehensive Income (Loss) on Derivatives (Effective Portion)	266	243
Foreign currency contracts | Not Designated as Hedging Instrument [Member] | Interest and other, net [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income On Derivatives	(160)	(238)
Foreign currency contracts | Assets | Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	173		21
Foreign currency contracts | Assets | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	167		374
Foreign currency contracts | Liabilities | Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	94		252
Foreign currency contracts | Liabilities | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	200		114
Interest rate contracts
Notional Disclosures [Abstract]
Derivative, Notional Amount	14,815	11,540	14,228
Effect of Fair Value Hedges on Results of Operations [Abstract]
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments	(14)	162
Interest rate contracts | Assets | Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	2		3
Interest rate contracts | Assets | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	16		15
Interest rate contracts | Liabilities | Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	200		187
Interest rate contracts | Liabilities | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	33		30
Other
Notional Disclosures [Abstract]
Derivative, Notional Amount	1,357	1,210	1,340
Other | Not Designated as Hedging Instrument [Member] | Various [Member]
Derivative Instruments Not Designated as Hedging Instruments [Abstract]
Gains (Losses) Recognized in Income On Derivatives	56	$ 4
Other | Assets | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative assets	10		9
Other | Liabilities | Not Designated as Hedging Instrument [Member]
Derivative Instruments in Statements of Financial Position, Fair Value [Abstract]
Fair value of derivative liabilities	$ 0		$ 0