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Supplemental Balance Sheet Information (Tables) | 12 Months Ended
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Dec. 31, 2019
Supplemental Balance Sheet Information [Abstract] |
Schedule of Other Assets [Table Text Block] | Other long-term assets
| As of December 31,
(in millions) | 2019 |  | 2018
Restricted cash equivalents | $ | 43 |  |  | $ | 27 |
Operating lease right-of-use assets | 336 |  |  | — |
Derivative assets | 216 |  |  | 183 |
Investments | 458 |  |  | 424 |
Licensing arrangements | 332 |  |  | — |
Other | 144 |  |  | 211 |
| $ | 1,529 |  |  | $ | 845 |
Trade accounts receivable, net | Trade accounts receivable, net
| As of December 31,
(in millions) | 2019 |  | 2018
Accounts receivable | $ | 1,902 |  |  | $ | 1,676 |
Allowance for doubtful accounts | (74 | ) |  | (68 | )
| $ | 1,828 |  |  | $ | 1,608 |
Rollforward of allowances for doubtful accounts | The following is a rollforward of our allowance for doubtful accounts:
| Year Ended December 31,
(in millions) | 2019 |  | 2018 |  | 2017
Beginning balance | $ | 68 |  |  | $ | 68 |  |  | $ | 73 |
Net charges to expenses | 23 |  |  | 19 |  |  | 14 |
Utilization of allowances | (17 | ) |  | (19 | ) |  | (18 | )
Ending balance | $ | 74 |  |  | $ | 68 |  |  | $ | 68 |
Inventories | Inventories
| As of December 31,
(in millions) | 2019 |  | 2018
Finished goods | $ | 971 |  |  | $ | 760 |
Work-in-process | 192 |  |  | 100 |
Raw materials | 416 |  |  | 306 |
| $ | 1,579 |  |  | $ | 1,166 |
Schedule of Other Current Assets [Table Text Block] | Other current assets
| As of December 31,
(in millions) | 2019 |  | 2018
Restricted cash and restricted cash equivalents | $ | 346 |  |  | $ | 655 |
Derivative assets | 105 |  |  | 122 |
Licensing arrangements | 186 |  |  | — |
Taxes receivable | 105 |  |  | 37 |
Other | 138 |  |  | 107 |
| $ | 880 |  |  | $ | 921 |
Property, plant and equipment, net | Property, plant and equipment, net
| As of December 31,
(in millions) | 2019 |  | 2018
Land | $ | 117 |  |  | $ | 97 |
Buildings and improvements | 1,198 |  |  | 1,100 |
Equipment, furniture and fixtures | 3,411 |  |  | 3,224 |
Capital in progress | 442 |  |  | 319 |
| 5,169 |  |  | 4,740 |
Less: accumulated depreciation | 3,089 |  |  | 2,958 |
| $ | 2,079 |  |  | $ | 1,782 |
Accrued expenses | Accrued expenses
| As of December 31,
(in millions) | 2019 |  | 2018
Legal reserves | $ | 470 |  |  | $ | 712 |
Payroll and related liabilities | 708 |  |  | 630 |
Accrued contingent consideration | 56 |  |  | 138 |
Rebates | 298 |  |  | 229 |
Other | 576 |  |  | 538 |
| $ | 2,109 |  |  | $ | 2,246 |
Other Current Liabilities [Table Text Block] | Other current liabilities
| As of December 31,
(in millions) | 2019 |  | 2018
Deferred revenue | $ | 144 |  |  | $ | 115 |
Licensing arrangements | 197 |  |  | — |
Taxes payable | 265 |  |  | 125 |
Other | 195 |  |  | 173 |
| $ | 800 |  |  | $ | 412 |
Other long-term liabilities | Other long-term liabilities
| As of December 31,
(in millions) | 2019 |  | 2018
Accrued income taxes | $ | 667 |  |  | $ | 739 |
Legal reserves | 227 |  |  | 217 |
Accrued contingent consideration | 299 |  |  | 209 |
Licensing arrangements | 374 |  |  | — |
Operating lease liabilities | 276 |  |  | — |
Other | 792 |  |  | 717 |
| $ | 2,635 |  |  | $ | 1,882 |

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