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EQUITY - ADDITIONAL INFORMATION (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2016 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock repurchase program, authorized amount | $ 1,000,000,000.0 |  |  |
Common shares available under share repurchase program (in shares) | shares | 350,000,000 |  |  |
Treasury shares purchased | $ 140,000,000 | $ 260,000,000 | $ 250,000,000 |
Proceeds from exercised stock options | $ 11,000,000 | $ 109,000,000 | $ 28,000,000 |
Number of stock option exercised (in shares) | shares | 300,000 | 2,700,000 | 1,000,000.0 |
Conversion ratio for RSUs and restricted stock | 3.09 |  |  |
Share-based compensation expense | $ 46,000,000 | $ 65,000,000 | $ 20,000,000 |
Intrinsic value of options exercised | 3,000,000 | 37,000,000 | 22,000,000 |
Total fair value of share vested during the period | $ 54,000,000 | 44,000,000 | 48,000,000 |
Weighted average remaining contractual life (in years) | 5 years 3 months 18 days |  |  |
Weighted average remaining contractual term of exercisable options (in years) | 3 years 10 months 24 days |  |  |
Selling, general and administrative expenses |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 45,000,000 | 63,000,000 | 18,000,000 |
Cost of products sold |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense | $ 1,000,000 | $ 2,000,000 | 1,000,000 |
Restructuring and other costs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-based compensation expense |  |  | $ 1,000,000 |
Equity Incentive Plan 2016 |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Authorized grants under the plan (in shares) | shares |  |  |  | 25,000,000
Number of shares available for grant (in shares) | shares | 25,000,000 |  |  |
Equity Incentive Plan 2016 | Key Employee |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Cap on restricted stock or RSU (in shares) | shares | 1,000,000 |  |  |
Nonqualified Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of stock option exercised (in shares) | shares | 300,000 |  |  |
Number of unvested stock options (in shares) | shares | 1,300,000 |  |  |
Unamortized compensation costs | $ 8,000,000 |  |  |
Weighted average period for cost recognition | 1 year 9 months 18 days |  |  |
Weighted average remaining contractual life (in years) | 5 years 3 months 18 days |  |  |
Restricted Stock Units (RSUs) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unamortized compensation costs | $ 70,000,000 |  |  |
Weighted average period for cost recognition | 2 years 1 month 6 days |  |  |

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