Consolidated Balance Sheets Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Assets [Abstract]
Cash and cash equivalents	$ 2,685.5	$ 1,365.5
Marketable securities	64.0	198.3
Trade accounts receivable, net	1,243.2	922.3
Inventories	627.6	472.5
Prepaid expenses and other current assets	456.1	426.4
Total current assets	5,076.4	3,385.0
Property, plant and equipment, net	1,163.3	1,471.5
Intangible assets, net	3,344.3	3,641.3
Goodwill	5,037.4	5,037.4
Right of use operating assets	204.0	0.0
Deferred tax assets	2,290.2	101.8
Other assets	429.0	294.9
Total assets	17,544.6	13,931.9
Liabilities and Equity [Abstract]
Accounts payable and accrued expenses	966.7	698.2
Revolving credit facility	0.0	250.0
Current portion of long-term debt	126.7	93.8
Current portion of contingent consideration	0.0	97.6
Other current liabilities	100.9	34.4
Total current liabilities	1,194.3	1,174.0
Long-term debt, less current portion	2,375.0	2,501.7
Contingent consideration	192.4	183.2
Facility lease obligations	0.0	361.0
Deferred tax liabilities	2,081.4	391.1
Noncurrent operating lease liabilities	164.1	0.0
Other liabilities	265.6	155.6
Total liabilities	6,272.8	4,766.6
Stockholders' Equity Attributable to Parent [Abstract]
Commitments and contingencies (Note 11)
Common stock, $.0001 par value; 290.0 shares authorized; 237.8 and 236.2 shares issued at 2019 and 2018, respectively	0.0	0.0
Additional paid-in capital	8,804.7	8,539.1
Treasury stock, at cost, 16.5 and 12.7 shares at 2019 and 2018, respectively	(2,105.9)	(1,689.9)
Accumulated other comprehensive loss	(66.8)	(9.7)
Retained earnings	4,639.8	2,325.8
Total stockholders' equity	11,271.8	9,165.3
Total liabilities and stockholders' equity	$ 17,544.6	$ 13,931.9