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Financial Instruments - Senior Notes Offering and Other Long-Term Debt (Details) - USD ($)
$ in Millions
Oct. 02, 2016
Dec. 31, 2015
Nov. 13, 2015
Jan. 28, 2013
Debt Instrument [Line Items]        
Debt, principal amount $ 4,501 $ 4,900    
Long-term debt current portion 0 400    
Senior Notes        
Debt Instrument [Line Items]        
Debt, principal amount     $ 1,250 $ 3,650
Debt, unamortized discount     $ 2 $ 10
Debt, purchase price percent due to downgrade of investment grade       101.00%
Senior Notes | 1.150% 2013 senior notes due 2016        
Debt Instrument [Line Items]        
Debt, principal amount $ 0 $ 400    
Interest rate percentage       1.15%