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Financial Instruments - Senior Notes Offering and Other Long-Term Debt (Details) - USD ($)
$ in Millions
Apr. 02, 2017
Dec. 31, 2016
Nov. 13, 2015
Jan. 28, 2013
Debt Instrument [Line Items]        
Debt, principal amount $ 4,500 $ 4,500    
Long-term debt current portion 750 0    
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 | 1.875% 2013 senior notes due 2018        
Debt Instrument [Line Items]        
Debt, principal amount $ 750 $ 750    
Interest rate percentage       1.875%