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Revenues (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)
Revenue from Contract with Customer [Abstract]
Number of operating segments | segment	1
Revenue from External Customer [Line Items]
Total revenues	$ 5,557	$ 5,554
Product sales [Member]
Revenue from External Customer [Line Items]
Total product sales	5,286	5,343
Product sales [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	3,991	4,147
Product sales [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	1,295	1,196
Enbrel® (etanercept) [Member]
Revenue from External Customer [Line Items]
Total product sales	1,151	1,105
Enbrel® (etanercept) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	1,106	1,050
Enbrel® (etanercept) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	45	55
Neulasta® (pegfilgrastim) [Member]
Revenue from External Customer [Line Items]
Total product sales	1,021	1,155
Neulasta® (pegfilgrastim) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	893	1,009
Neulasta® (pegfilgrastim) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	128	146
Prolia® (denosumab) [Member]
Revenue from External Customer [Line Items]
Total product sales	592	494
Prolia® (denosumab) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	390	320
Prolia® (denosumab) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	202	174
XGEVA® (denosumab) [Member]
Revenue from External Customer [Line Items]
Total product sales	471	445
XGEVA® (denosumab) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	356	332
XGEVA® (denosumab) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	115	113
Aranesp® (darbepoetin alfa) [Member]
Revenue from External Customer [Line Items]
Total product sales	414	454
Aranesp® (darbepoetin alfa) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	182	225
Aranesp® (darbepoetin alfa) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	232	229
KYPROLIS® (carfilzomib) [Member]
Revenue from External Customer [Line Items]
Total product sales	245	222
KYPROLIS® (carfilzomib) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	154	137
KYPROLIS® (carfilzomib) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	91	85
EPOGEN® (epoetin alfa) [Member]
Revenue from External Customer [Line Items]
Total product sales	219	244
EPOGEN® (epoetin alfa) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	219	244
EPOGEN® (epoetin alfa) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	0	0
Sensipar® / Mimpara® (cinacalcet) [Member]
Revenue from External Customer [Line Items]
Total product sales	213	497
Sensipar® / Mimpara® (cinacalcet) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	135	409
Sensipar® / Mimpara® (cinacalcet) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	78	88
Other products [Member]
Revenue from External Customer [Line Items]
Total product sales	960	727
Other products [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	556	421
Other products [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	404	306
Other revenues [Member]
Revenue from External Customer [Line Items]
Total revenues	$ 271	$ 211

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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