Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net sales	$ 2,631	$ 2,490	$ 5,124	$ 4,870
Cost of products sold	758	739	1,488	1,411
Gross profit	1,873	1,751	3,636	3,458
Operating expenses:
Selling, general and administrative expenses	968	886	1,837	1,746
Research and development expenses	280	275	559	536
Royalty expense	17	17	32	35
Amortization expense	161	147	321	288
Intangible asset impairment charges	37	34	105	35
Contingent consideration expense (benefit)	10	(4)	(18)	1
Restructuring charges (credits)	1	5	7	18
Litigation-related net charges (credits)	15	0	(133)	0
Operating expenses	1,489	1,359	2,711	2,659
Operating income (loss)	384	392	925	799
Other income (expense):
Interest expense	(89)	(57)	(198)	(119)
Other, net	(150)	12	(125)	(11)
Income (loss) before income taxes	145	347	602	670
Income tax expense (benefit)	(9)	(209)	24	(183)
Net income (loss)	$ 154	$ 555	$ 578	$ 853
Net income (loss) per common share — basic	$ 0.11	$ 0.40	$ 0.42	$ 0.62
Net income (loss) per common share — assuming dilution	$ 0.11	$ 0.40	$ 0.41	$ 0.61
Weighted-average shares outstanding
Basic	1,391.0	1,380.5	1,389.4	1,378.5
Assuming dilution	1,408.6	1,398.9	1,408.5	1,397.8