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Pension Benefits Level 3 Gains and Losses (Details) - Pension - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year $ 4,584 $ 5,028
Fair Value, End of Year 4,544 4,584
Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 141 8
Sales (3) (3)
Purchases 0 138
Transfers (3)  
Realized gain and unrealized gain (loss) (7) (1)
Currency Translation 3 (1)
Fair Value, End of Year 131 141
Bonds, corporate    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 419  
Fair Value, End of Year 452 419
Bonds, corporate | Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 0  
Fair Value, End of Year 0 0
Real estate    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 135  
Fair Value, End of Year 117 135
Real estate | Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 0  
Fair Value, End of Year 0 0
Buy-in Annuity Contract    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 135  
Fair Value, End of Year 131 135
Buy-in Annuity Contract | Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 135 0
Sales 0 0
Purchases 0 135
Transfers 0  
Realized gain and unrealized gain (loss) (7) 0
Currency Translation 3 0
Fair Value, End of Year 131 135
Other Investments [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 66  
Fair Value, End of Year 153 66
Other Investments [Member] | Level 3 [Member]    
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Fair Value, Beginning of Year 6 8
Sales (3) (3)
Purchases 0 3
Transfers (3)  
Realized gain and unrealized gain (loss) 0 (1)
Currency Translation 0 (1)
Fair Value, End of Year $ 0 $ 6