Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 1,573.8	$ 2,326.5
Marketable securities	2,115.2	2,568.6
Accounts receivable, net	1,787.0	1,441.6
Due from anti-CD20 therapeutic programs	532.6	300.6
Inventory	902.7	1,001.6
Other current assets	962.0	1,093.3
Total current assets	7,873.3	8,732.2
Marketable securities	3,057.3	2,829.4
Property, plant and equipment, net	3,182.4	2,501.8
Intangible assets, net	3,879.6	3,808.3
Goodwill	4,632.5	3,669.3
Investments and other assets	1,027.5	1,335.8
Total assets	23,652.6	22,876.8
Current liabilities:
Current portion of notes payable and other financing arrangements	3.2	4.7
Taxes payable	68.2	231.9
Accounts payable	395.5	279.8
Accrued expenses and other	2,901.3	2,903.5
Total current liabilities	3,368.2	3,419.9
Notes payable and other financing arrangements	5,935.0	6,512.7
Deferred tax liability	122.6	93.1
Other long-term liabilities	1,628.7	722.5
Total liabilities	11,054.5	10,748.2
Commitments and contingencies
Biogen Idec Inc. shareholders' equity
Preferred stock, par value $0.001 per share	0.0	0.0
Common stock, par value $0.0005 per share	0.1	0.1
Additional paid-in capital	97.8	0.0
Accumulated other comprehensive loss	(318.4)	(319.9)
Retained earnings	15,810.4	15,071.6
Treasury stock, at cost; 23.8 million and 22.6 million shares, respectively	(2,977.1)	(2,611.7)
Total Biogen Inc. shareholders’ equity	12,612.8	12,140.1
Noncontrolling interests	(14.7)	(11.5)
Total equity	12,598.1	12,128.6
Total liabilities and equity	$ 23,652.6	$ 22,876.8