CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 719.7	$ 669.2
Marketable investments	850.3	746.7
Accounts receivable, no allowance for 2019 and 2018	183.6	175.7
Inventories, net	94.1	101.0
Other current assets	85.7	75.4
Total current assets	1,933.4	1,768.0
Marketable investments	730.4	442.6
Goodwill and other intangible assets, net	158.4	170.8
Property, plant and equipment, net	678.3	699.7
Deferred tax assets, net	268.1	95.7
Other non-current assets	231.0	224.2
Total assets	3,999.6	3,401.0
Current liabilities:
Accounts payable and accrued expenses	161.1	166.1
Line of credit (current)	250.0
Share tracking awards plan	18.3	72.2
Other current liabilities	40.5	38.3
Total current liabilities	469.9	276.6
Line of credit (non-current)	750.0	250.0
Other non-current liabilities	63.9	66.6
Total liabilities	1,283.8	593.2
Commitments and contingencies
Temporary equity		19.2
Stockholders' equity:
Common stock, par value $.01, 245,000,000 shares authorized, 70,499,819 and 70,207,581 shares issued, and 43,880,603 and 43,588,365 shares outstanding at September 30, 2019 and December 31, 2018, respectively	0.7	0.7
Additional paid-in capital	2,025.8	1,940.2
Accumulated other comprehensive loss	(4.1)	(7.9)
Treasury stock, 26,619,216 shares at September 30, 2019 and December 31, 2018	(2,579.2)	(2,579.2)
Retained earnings	3,272.6	3,434.8
Total stockholders' equity	2,715.8	2,788.6
Total liabilities and stockholders' equity	3,999.6	3,401.0
Preferred stock
Stockholders' equity:
Preferred stock, par value $.01, 10,000,000 shares authorized, no shares issued
Series A junior participating preferred stock
Stockholders' equity:
Preferred stock, par value $.01, 10,000,000 shares authorized, no shares issued