Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 3,419.3	$ 2,261.4
Marketable securities	1,473.5	1,541.1
Accounts receivable, net	1,705.0	1,549.4
Due from anti-CD20 therapeutic programs	431.4	412.3
Inventory	1,344.4	1,351.5
Other current assets	1,417.6	740.8
Total current assets	9,791.2	7,856.5
Marketable securities	705.7	892.0
Property, plant and equipment, net	3,298.6	3,416.4
Operating lease assets	403.9	375.4
Intangible assets, net	1,850.1	2,221.3
Goodwill	5,749.0	5,761.1
Deferred tax asset	1,226.4	1,415.1
Investments and other assets	1,529.2	1,939.5
Total assets	24,554.1	23,877.3
Current liabilities:
Current portion of notes payable	0.0	999.1
Taxes payable	259.9	174.7
Accounts payable	491.5	589.2
Accrued expense and other	2,521.4	2,535.2
Total current liabilities	3,272.8	4,298.2
Notes payable	6,281.0	6,274.0
Deferred tax liability	334.7	694.5
Long-term operating lease liabilities	333.0	330.4
Other long-term liabilities	944.2	1,320.5
Total liabilities	11,165.7	12,917.6
Commitments, contingencies and guarantees (Notes 22 and 23)
Biogen 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	73.3	68.2
Accumulated other comprehensive loss	(164.9)	(106.7)
Retained earnings	16,466.5	13,911.7
Treasury stock, at cost; 23.8 million and 23.8 million shares, respectively	(2,977.1)	(2,977.1)
Total Biogen Inc. shareholders’ equity	13,397.9	10,896.2
Noncontrolling interests	(9.5)	63.5
Total equity	13,388.4	10,959.7
Total liabilities and equity	$ 24,554.1	$ 23,877.3