Selected Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

2017	Fourth			Third		Second		First
Revenue	$	6,160.7		$	5,658.0	$	5,824.3	$	5,228.3
Cost of sales	1,624.8			1,566.1		1,551.6		1,327.7
Operating expenses(1)	3,253.7			2,874.9		2,958.3		2,783.0
Acquired in-process research and development(2)	50.0			205.0		—		857.6
Asset impairment, restructuring, and other special charges(3)	1,003.2			406.5		50.0		213.9
Income before income taxes	284.1			591.6		1,260.5		61.2
Income taxes(4)	1,941.0			36.0		252.5		172.0
Net income (loss)	(1,656.9		)	555.6		1,008.0		(110.8		)
Earnings (loss) per share—basic	(1.58		)	0.53		0.96		(0.10		)
Earnings (loss) per share—diluted	(1.58		)	0.53		0.95		(0.10		)
Dividends paid per share	0.52			0.52		0.52		0.52
Common stock closing prices:
High	87.89			85.54		86.25		85.88
Low	81.94			77.07		76.98		74.58
2016	Fourth			Third		Second		First
Revenue	$	5,760.5		$	5,191.7	$	5,404.8	$	4,865.1
Cost of sales	1,466.0			1,400.9		1,465.0		1,323.0
Operating expenses(1)	3,240.7			2,801.8		2,958.5		2,694.9
Acquired in-process research and development	30.0			—		—		—
Asset impairment, restructuring, and other special charges	147.6			45.5		58.0		131.4
Income before income taxes	892.0			970.7		944.5		566.8
Income taxes	120.2			192.7		196.8		126.7
Net income	771.8			778.0		747.7		440.1
Earnings per share—basic	0.73			0.74		0.71		0.42
Earnings per share—diluted	0.73			0.73		0.71		0.41
Dividends paid per share	0.51			0.51		0.51		0.51
Common stock closing prices:
High	83.06			83.40		78.75		84.11
Low	65.97			76.85		72.57		69.06

⁽¹⁾ Includes research and development and marketing, selling, and administrative expenses.