CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Current assets:
Cash (including cash equivalent investments of $867,112 at March 31, 2013 and $1,576,922 at March 31, 2012)	$ 935,675	$ 1,579,515
Marketable securities	739,198	847,555
Accounts receivable, less allowance for doubtful accounts of $2,003 at March 31, 2013 and $2,290 at March 31, 2012	478,032	471,784
Inventories, net	393,901	298,118
Deferred income taxes	266,455	246,451
Other current assets	134,525	142,772
Total current assets	2,947,786	3,586,195
Non-current assets:
Marketable securities and investments	1,349,424	723,367
Property, plant and equipment, net	376,960	360,020
Goodwill	713,091	713,091
License agreements, product rights and other intangibles, net	2,127,639	2,104,048
Other assets	114,682	5,034
Total assets	7,629,582	7,491,755
Current liabilities:
Accounts payable	157,349	154,275
Accrued expenses and other liabilities	840,342	745,511
Total current liabilities	997,691	899,786
Long-term liabilities:
Income tax liabilities	567,311	570,417
Deferred tax liabilities	283,245	289,993
Contingent acquisition and other liabilities	36,080	54,742
Total liabilities	1,884,327	1,814,938
Contingencies (Note 13)
Stockholders' equity:
Preferred stock, $1.00 par; shares authorized 1,000; no shares issued or outstanding	0	0
Common stock $.10 par; shares authorized 1,000,000; issued 430,385 shares in 2013 and 428,746 shares in 2012	43,039	42,875
Additional paid-in capital	1,799,071	1,700,734
Retained earnings	9,055,344	9,087,447
Accumulated other comprehensive income (loss)	10,116	(2,934)
Treasury stock, at cost (163,886 shares in 2013 and 160,640 shares in 2012)	(5,162,315)	(5,151,305)
Total stockholders' equity	5,745,255	5,676,817
Total liabilities and stockholders' equity	$ 7,629,582	$ 7,491,755