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SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2019
Accounting Policies [Abstract] |
Schedule of estimated useful lives of property, plant and equipment | Depreciation is calculated using the straight-line method, commencing when the assets become available for productive use, based on the following estimated useful lives:
Land improvements |  | 15 - 30 years
Buildings and improvements |  | Up to 40 years
Machinery and equipment |  | 3 - 20 years
Other equipment |  | 3 - 10 years
Equipment on operating lease |  | Up to 5 years
Leasehold improvements |  | Lesser of term of lease or 10 years
Schedule of estimated useful lives of intangible assets | Amortization is calculated primarily using the straight-line method based on the following estimated useful lives:
Product brands |  | 2 - 20 years
Corporate brands |  | 7 - 20 years
Product rights |  | 3 - 15 years
Partner relationships |  | 7 - 9 years
Out-licensed technology and other |  | 8 - 10 years
Summary of variable consideration provisions | The following table presents the activity and ending balances of the Company’s variable consideration provisions for years ended December 31, 2019 and 2018.
(in millions) |  | Discounts and Allowances |  | Returns |  | Rebates |  | Chargebacks |  | Distribution Fees |  | Total
Reserve balance, January 1, 2018 |  | $ | 167 |  |  | $ | 863 |  |  | $ | 1,094 |  |  | $ | 274 |  |  | $ | 148 |  |  | $ | 2,546 |
Current period provision |  | 865 |  |  | 293 |  |  | 2,551 |  |  | 1,966 |  |  | 212 |  |  | 5,887 |
Payments and credits |  | (857 | ) |  | (343 | ) |  | (2,621 | ) |  | (2,031 | ) |  | (197 | ) |  | (6,049 | )
Reserve balance, December 31, 2018 |  | 175 |  |  | 813 |  |  | 1,024 |  |  | 209 |  |  | 163 |  |  | 2,384 |
Acquisition of Synergy |  | — |  |  | 3 |  |  | 12 |  |  | — |  |  | 1 |  |  | 16 |
Current period provision |  | 776 |  |  | 113 |  |  | 2,265 |  |  | 1,938 |  |  | 195 |  |  | 5,287 |
Payments and credits |  | (769 | ) |  | (238 | ) |  | (2,374 | ) |  | (1,979 | ) |  | (277 | ) |  | (5,637 | )
Reserve balance, December 31, 2019 |  | $ | 182 |  |  | $ | 691 |  |  | $ | 927 |  |  | $ | 168 |  |  | $ | 82 |  |  | $ | 2,050 |

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