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Equity Narrative (Details) - USD ($)
shares in Millions
12 Months Ended
Dec. 31, 2016
Jan. 02, 2016
Jan. 03, 2015
Dec. 31, 2015
Feb. 28, 2014
Equity, Class of Treasury Stock [Line Items]          
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 2.8 2.7 5.0    
Shares issued to employees and directors under various benefit plans and stock purchase programs 7.0 5.0 4.0    
Common stock repurchases (in shares) 6.0 11.0 11.0    
Common stock repurchased $ 426,000,000 $ 731,000,000 $ 690,000,000    
February 2014 Share Repurchase Program          
Equity, Class of Treasury Stock [Line Items]          
Stock repurchase program, authorized amount         $ 1,500,000,000.0
December 2015 Share Repurchase Program [Member]          
Equity, Class of Treasury Stock [Line Items]          
Stock repurchase program, authorized amount       $ 1,500,000,000