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Revenues (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)
Revenue from Contract with Customer [Abstract]
Number of operating segments | segment			1
Revenue from External Customer [Line Items]
Total revenues	$ 5,871	$ 6,059	$ 11,428	$ 11,613
Product sales [Member]
Revenue from External Customer [Line Items]
Total product sales	5,574	5,679	10,860	11,022
Product sales [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	4,142	4,367	8,133	8,514
Product sales [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	1,432	1,312	2,727	2,508
Enbrel® (etanercept) [Member]
Revenue from External Customer [Line Items]
Total product sales	1,363	1,302	2,514	2,407
Enbrel® (etanercept) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	1,315	1,252	2,421	2,302
Enbrel® (etanercept) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	48	50	93	105
Neulasta® (pegfilgrastim) [Member]
Revenue from External Customer [Line Items]
Total product sales	824	1,100	1,845	2,255
Neulasta® (pegfilgrastim) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	719	948	1,612	1,957
Neulasta® (pegfilgrastim) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	105	152	233	298
Prolia® (denosumab) [Member]
Revenue from External Customer [Line Items]
Total product sales	698	610	1,290	1,104
Prolia® (denosumab) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	458	396	848	716
Prolia® (denosumab) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	240	214	442	388
XGEVA® (denosumab) [Member]
Revenue from External Customer [Line Items]
Total product sales	499	452	970	897
XGEVA® (denosumab) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	379	339	735	671
XGEVA® (denosumab) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	120	113	235	226
Aranesp® (darbepoetin alfa) [Member]
Revenue from External Customer [Line Items]
Total product sales	436	472	850	926
Aranesp® (darbepoetin alfa) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	192	241	374	466
Aranesp® (darbepoetin alfa) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	244	231	476	460
KYPROLIS® (carfilzomib) [Member]
Revenue from External Customer [Line Items]
Total product sales	267	263	512	485
KYPROLIS® (carfilzomib) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	166	151	320	288
KYPROLIS® (carfilzomib) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	101	112	192	197
EPOGEN® (epoetin alfa) [Member]
Revenue from External Customer [Line Items]
Total product sales	223	250	442	494
EPOGEN® (epoetin alfa) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	223	250	442	494
EPOGEN® (epoetin alfa) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	0	0	0	0
Sensipar® / Mimpara® (cinacalcet) [Member]
Revenue from External Customer [Line Items]
Total product sales	122	420	335	917
Sensipar® / Mimpara® (cinacalcet) [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	43	330	178	739
Sensipar® / Mimpara® (cinacalcet) [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	79	90	157	178
Other products [Member]
Revenue from External Customer [Line Items]
Total product sales	1,142	810	2,102	1,537
Other products [Member] | US [Member]
Revenue from External Customer [Line Items]
Total product sales	647	460	1,203	881
Other products [Member] | ROW [Member]
Revenue from External Customer [Line Items]
Total product sales	495	350	899	656
Other revenues [Member]
Revenue from External Customer [Line Items]
Total revenues	$ 297	$ 380	$ 568	$ 591

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