Hedging Transactions and Derivative Financial Instruments (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Apr. 03, 2015
Mar. 28, 2014
Dec. 31, 2014
Derivative Instrument Detail [Abstract]      
Maximum length of time over which future cash flow exposures are hedged (in years) 3 years    
Cash Flow Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net $ 668 $ (123)  
Net Investment Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 3,021   2,047
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net 498 (68)  
Foreign currency denominated debt | Cash Flow Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net (92)    
Foreign currency contracts | Cash Flow Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 13,100   13,224
Foreign currency contracts | Net Investment Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 2,047   2,047
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net 424 (68)  
Commodity contracts | Cash Flow Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 6   9
Interest Rate Contracts | Cash Flow Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 4,328   4,328
Interest Rate Contracts | Fair Value Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 8,452   6,600
Cross Currency Swap | Cash Flow Hedging [Member]      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount     2,590
Designated as Hedging Instrument [Member]      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 1,772   1,429
Derivative instruments, liabilities, fair value 233   320
Designated as Hedging Instrument [Member] | Foreign currency contracts | Prepaid expenses and other assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 1,065   923
Designated as Hedging Instrument [Member] | Foreign currency contracts | Other Assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 593   346
Designated as Hedging Instrument [Member] | Foreign currency contracts | Other Liabilities      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 21   249
Designated as Hedging Instrument [Member] | Interest Rate Contracts | Prepaid expenses and other assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 8   14
Designated as Hedging Instrument [Member] | Interest Rate Contracts | Other Assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 106   146
Designated as Hedging Instrument [Member] | Interest Rate Contracts | Accounts Payable and Accrued Liabilities [Member]      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 39   11
Designated as Hedging Instrument [Member] | Interest Rate Contracts | Other Liabilities      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 130   35
Not Designated as Hedging Instrument [Member]      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 353   301
Derivative instruments, liabilities, fair value 226   240
Not Designated as Hedging Instrument [Member] | Foreign currency contracts      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 5,475   4,334
Not Designated as Hedging Instrument [Member] | Foreign currency contracts | Prepaid expenses and other assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 92   44
Not Designated as Hedging Instrument [Member] | Foreign currency contracts | Other Assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 251   231
Not Designated as Hedging Instrument [Member] | Foreign currency contracts | Accounts Payable and Accrued Liabilities [Member]      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 35   33
Not Designated as Hedging Instrument [Member] | Foreign currency contracts | Other Liabilities      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 0   21
Not Designated as Hedging Instrument [Member] | Commodity contracts      
Derivative Instrument Detail [Abstract]      
Derivative, Notional Amount 1,058   816
Not Designated as Hedging Instrument [Member] | Commodity contracts | Prepaid expenses and other assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 7   9
Not Designated as Hedging Instrument [Member] | Commodity contracts | Other Assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 1   1
Not Designated as Hedging Instrument [Member] | Commodity contracts | Accounts Payable and Accrued Liabilities [Member]      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 158   156
Not Designated as Hedging Instrument [Member] | Commodity contracts | Other Liabilities      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 7   17
Not Designated as Hedging Instrument [Member] | Interest Rate Contracts | Other Liabilities      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 2   2
Not Designated as Hedging Instrument [Member] | Other derivative instruments | Prepaid expenses and other assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 1   14
Not Designated as Hedging Instrument [Member] | Other derivative instruments | Other Assets      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, assets, fair value 1   2
Not Designated as Hedging Instrument [Member] | Other derivative instruments | Accounts Payable and Accrued Liabilities [Member]      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value 22   11
Not Designated as Hedging Instrument [Member] | Other derivative instruments | Other Liabilities      
Fair Value, Derivatives Designated and Not Designated as Hedges      
Derivative instruments, liabilities, fair value $ 2   $ 0