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Stock Ownership Plans (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Feb. 22, 2016
Feb. 23, 2015
Dec. 31, 2014
Feb. 24, 2014
May 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Share Price       $ 24.55 $ 17.26   $ 16.31  
Unrecognized Compensation Cost - Stock Options $ 32              
Fair value of the Free Cash Flow (FCF) performance awards $ 6 $ 8 $ 6          
Closing stock price at year end $ 24.79 $ 21.63 $ 18.44          
Target payout of Free Cash Flows (FCF) performance awards 98.00%              
Stock Issued During Period, Shares, Employee Stock Purchase Plans 2,491,000 2,337,000 2,529,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 15,250,000 18,797,000 23,764,000     30,535,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 18 $ 14 $ 11     $ 9    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 4,798,000 6,132,000 6,606,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 24 $ 17 $ 16          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (7,663,000) (10,045,000) (11,607,000)          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 11 $ 10 $ 8          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (683,000) (1,054,000) (1,770,000)          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value $ 17 $ 13 $ 10          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 26,716,000 26,644,000 31,089,000     39,508,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 4,439,000 4,186,000 4,441,000          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (3,922,000) (6,612,000) (9,040,000)          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price $ 10 $ 12 $ 9          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period (445,000) (2,019,000) (3,820,000)          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price $ 17 $ 21 $ 25          
Stock-based compensation expense $ 127 $ 116 $ 107          
Common Stock, Shares Authorized 2,000,000,000 2,000,000,000            
Common Stock, Capital Shares Reserved for Future Issuance 141,000,000              
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense $ (32) $ (29) (28)          
Share-based compensation, net of tax benefit $ 96 $ 87 $ 79          
compensation expense, per share - basic $ 0.07 $ 0.06 $ 0.06          
compensation expense, per share - diluted 0.07 0.06 0.06          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price 24.70 17.46 16.49          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 7.16 $ 5.60 $ 5.54          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 25.00% 30.00% 31.00%          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 6 years 1 month 6 years 6 years          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum 2.03% 1.14% 1.49%          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum 2.21% 2.08% 1.92%          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value $ 64 $ 64 $ 69          
Employee Stock Ownership Plan (ESOP), Compensation Expense $ 13 $ 11 $ 9          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price $ 13 $ 11 $ 11     $ 11    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 5 years 8 months 18 days              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value $ 305              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number 16,806,000              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price $ 10              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 4 years 1 month 18 days              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 257              
Options expected to vest 9,253,000              
Options expected to vest, weighted average exercise price $ 20              
Options expected to vest, weighted average remaining contractual life 8 years 2 months 18 days              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 46              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 26,059,000              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price $ 13              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term 5 years 7 months 12 days              
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value $ 302              
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value $ 190 $ 179 $ 186          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 50,000,000              
Amount of employees total compensation eligible for GESOP purchase 10.00%              
Global Employee Stock Purchase Plan - Exercise Amount equivalent to 85% of Fair Market Value of Common Stock at beginning or end of each offering period (whichever is less) 85.00%              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 13,000,000              
Unrecognized Compensation Cost - Non-vested stock awards $ 144              
Unrecognized Compensation Cost $ 176              
weighted average remaining vesting period 1 year 3 months 18 days              
annualweightedaverageforfeiturerate 7.00%              
Nonqualified Options Vesting Period 4 years              
Nonqualified Options Contractual Life 10 years              
voting power of all classes of stock 10.00%              
Exercise price of the fair market value of our common stock on the date of grant 110.00%              
Qualified options expire over a period not to exceed 5 years              
Qualified options exercise price $ 0              
High end of range [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Range of the target number of performance-based DSUs awarded 150.00%              
Employee stock purchase plan, purchase price, range $ 21.07 $ 18.39 $ 15.13          
Minimum [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Range of the target number of performance-based DSUs awarded 0.00%              
Employee stock purchase plan, purchase price, range $ 18.60 $ 15.29 $ 11.24          
2011 LTIP Plan [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Common Stock, Shares Authorized               146,000,000
Cost of products sold [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense $ 7 $ 6 $ 7          
Selling, General and Administrative Expenses [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense 98 90 81          
Research and Development Expense [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Stock-based compensation expense 23 20 19          
2015 awards [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fair value of market based awards $ 8              
Measurement period - market based awards 2 years 9 months 24 days              
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 1.45%              
2014 awards [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fair value of market based awards   $ 6            
Measurement period - market based awards   2 years 10 months 24 days            
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate   0.90%            
2013 awards [Member]                
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                
Fair value of market based awards     $ 7          
Measurement period - market based awards     3 years          
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate     0.98%