CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 685.4	$ 738.4
Marketable investments	875.3	747.5
Accounts receivable, no allowance for 2020 and 2019	172.0	151.4
Inventories, net	89.7	93.4
Other current assets	72.0	133.8
Total current assets	1,894.4	1,864.5
Marketable investments	1,009.4	767.5
Goodwill and other intangible assets, net	158.2	158.3
Property, plant, and equipment, net	744.2	738.5
Deferred tax assets, net	245.8	230.0
Other non-current assets	167.4	154.6
Total assets	4,219.4	3,913.4
Current liabilities:
Accounts payable and accrued expenses	152.6	148.4
Line of credit (current)	0.0	250.0
Share tracking awards plan	61.0	25.0
Other current liabilities	41.4	39.6
Total current liabilities	255.0	463.0
Line of credit (non-current)	800.0	600.0
Other non-current liabilities	70.7	70.0
Total liabilities	1,125.7	1,133.0
Stockholders’ equity:
Preferred stock, value issued	0.0	0.0
Common stock, par value $.01, 245,000,000 shares authorized, 70,976,064 and 70,503,775 shares issued, and 44,356,848 and 43,884,559 shares outstanding at June 30, 2020 and December 31, 2019, respectively	0.7	0.7
Additional paid-in capital	2,105.1	2,047.9
Accumulated other comprehensive loss	(2.1)	(14.2)
Treasury stock, 26,619,216 shares at June 30, 2020 and December 31, 2019	(2,579.2)	(2,579.2)
Retained earnings	3,569.2	3,325.2
Total stockholders’ equity	3,093.7	2,780.4
Total liabilities and stockholders’ equity	$ 4,219.4	$ 3,913.4