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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended
Apr. 02, 2017
Apr. 03, 2016
Mar. 01, 2017
Class of Stock [Line Items]      
Stock Repurchase Program, Number of Shares Authorized to be Repurchased     10.0
Stock repurchased during the period, shares 1.9 7.8  
Stock repurchased during the period, value $ 355 $ 1,000  
Remaining number of shares authorized to be repurchased, shares 13.5    
Shares remaining to be repurchased as a percent of total shares outstanding 4.00%    
Recognized net actuarial loss (before tax) $ 85 83  
Amortization of prior service credit (before tax) 18 19  
Purchases of common stock $ 354 $ 1,026  
Dividends declared per share $ 0.84 $ 0.76  
Dividends paid in cash $ 230 $ 215