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Revenues - Narrative (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Sep. 30, 2018 USD ($) | Jun. 30, 2018 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2019 USD ($) segment customer | Dec. 31, 2018 USD ($) customer | Dec. 31, 2017 USD ($) customer
Revenue from Contract with Customer [Abstract] |  |  |  |  |  |  |  |  |  |  |
Number of operating segments | segment |  |  |  |  |  |  |  |  | 1 |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of major customers (as defined) accounting for more than 10% of total revenue | customer |  |  |  |  |  |  |  |  | 3 | 3 | 3
Threshold as a percentage of total revenues for determining a major customer for additional disclosures |  |  |  |  |  |  |  |  | 10.00% | 10.00% | 10.00%
Major customers (as defined) accounting for more than 10% of gross trade receivables | customer |  |  |  |  |  |  |  |  | 3 | 3 |
Combined trade receivables for all major customers (as defined) as a percentage of net trade receivables | 73.00% |  |  |  | 76.00% |  |  |  | 73.00% | 76.00% |
Percentage of worldwide gross revenues derived from major customers (as defined) on a combined basis |  |  |  |  |  |  |  |  | 81.00% |  |
Total product sales |  |  |  |  |  |  |  |  | $ 23,362 | $ 23,747 | $ 22,849
Percentage of net trade receivables due from customers located outside the United States, primarily in Europe | 27.00% |  |  |  | 23.00% |  |  |  | 27.00% | 23.00% |
US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | $ 17,224 | $ 18,358 | 18,029
ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 6,138 | 5,389 | 4,820
Product sales [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales | $ 5,881 | $ 5,463 | $ 5,574 | $ 5,286 | $ 6,001 | $ 5,510 | $ 5,679 | $ 5,343 | 22,204 | 22,533 | 21,795
Product sales [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 16,531 | 17,429 | 17,131
Product sales [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 5,673 | 5,104 | 4,664
Enbrel® (etanercept) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 5,226 | 5,014 | 5,433
Enbrel® (etanercept) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 5,050 | 4,807 | 5,206
Enbrel® (etanercept) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 176 | 207 | 227
Neulasta® (pegfilgrastim) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 3,221 | 4,475 | 4,534
Neulasta® (pegfilgrastim) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 2,814 | 3,866 | 3,931
Neulasta® (pegfilgrastim) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 407 | 609 | 603
Prolia® (denosumab) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 2,672 | 2,291 | 1,968
Prolia® (denosumab) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 1,772 | 1,500 | 1,272
Prolia® (denosumab) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 900 | 791 | 696
XGEVA® (denosumab) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 1,935 | 1,786 | 1,575
XGEVA® (denosumab) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 1,457 | 1,338 | 1,157
XGEVA® (denosumab) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 478 | 448 | 418
Aranesp® (darbepoetin alfa) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 1,729 | 1,877 | 2,053
Aranesp® (darbepoetin alfa) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 758 | 942 | 1,114
Aranesp® (darbepoetin alfa) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 971 | 935 | 939
Kyprolis [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 1,044 | 968 | 835
Kyprolis [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 654 | 583 | 562
Kyprolis [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 390 | 385 | 273
EPOGEN® (epoetin alfa) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 867 | 1,010 | 1,096
EPOGEN® (epoetin alfa) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 867 | 1,010 | 1,096
EPOGEN® (epoetin alfa) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 0 | 0 | 0
Sensipar® / Mimpara® (cinacalcet) [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 551 | 1,774 | 1,718
Sensipar® / Mimpara® (cinacalcet) [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 252 | 1,436 | 1,374
Sensipar® / Mimpara® (cinacalcet) [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 299 | 338 | 344
Other products [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 4,959 | 3,338 | 2,583
Other products [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 2,907 | 1,947 | 1,419
Other products [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 2,052 | 1,391 | 1,164
Other revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 1,158 | 1,214 | 1,054
Other revenues [Member] | US [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | 693 | 929 | 898
Other revenues [Member] | ROW [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | $ 465 | $ 285 | 156
AmerisourceBergen Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount due from major customer (as defined) as a percentage of gross trade receivables |  |  |  |  |  |  |  |  | exceeded 10% | exceeded 10% |
AmerisourceBergen Corporation [Member] | Product sales [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | $ 12,301 | $ 12,091 | 10,742
McKesson Corporation [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount due from major customer (as defined) as a percentage of gross trade receivables |  |  |  |  |  |  |  |  | exceeded 10% | exceeded 10% |
McKesson Corporation [Member] | Product sales [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | $ 11,795 | $ 11,434 | 10,625
Cardinal Health, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Amount due from major customer (as defined) as a percentage of gross trade receivables |  |  |  |  |  |  |  |  | exceeded 10% | exceeded 10% |
Cardinal Health, Inc. [Member] | Product sales [Member] |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total product sales |  |  |  |  |  |  |  |  | $ 6,538 | $ 7,475 | $ 7,049

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