Consolidated Condensed Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash Flows from Operating Activities
Net income	$ 727,900,000	$ 1,548,000,000
Adjustments to Reconcile Net Income to Cash Flows from Operating Activities:
Depreciation and amortization	348,800,000	381,500,000
Change in deferred income taxes	(93,500,000)	51,000,000
Stock-based compensation expense	38,300,000	35,200,000
Income related to the termination of the exenatide collaboration	0	(495,400,000)
Other changes in operating assets and liabilities, net of acquisitions and divestitures	941,300,000	1,048,100,000
Other operating activities, net	5,100,000	9,200,000
Net Cash Provided by Operating Activities	272,300,000	379,400,000
Cash Flows from Investing Activities
Net purchases of property and equipment	(202,000,000)	(157,900,000)
Proceeds from sales and maturities of short-term investments	1,166,900,000	1,607,500,000
Purchases of short-term investments	(402,800,000)	(313,100,000)
Proceeds from sales and maturities of noncurrent investments	2,633,400,000	2,098,400,000
Purchases of noncurrent investments	(2,770,200,000)	(1,861,400,000)
Purchase of product rights	(25,000,000)	0
Other investing activities, net	(11,900,000)	(18,400,000)
Net Cash Provided by Investing Activities	388,400,000	1,355,100,000
Cash Flows from Financing Activities
Dividends paid	(524,100,000)	(531,100,000)
Proceeds from issuance of long-term debt	992,900,000	0
Repayment of long-term debt	(1,002,000,000)	(900,000)
Purchases of common stock	(55,000,000)	(1,198,100,000)
Other financing activities, net	(6,900,000)	0
Net Cash Used for Financing Activities	(595,100,000)	(1,730,100,000)
Effect of exchange rate changes on cash and cash equivalents	(7,800,000)	(86,600,000)
Net increase (decrease) in cash and cash equivalents	57,800,000	(82,200,000)
Cash and cash equivalents at January 1	3,830,200,000	4,018,800,000
Cash and Cash Equivalents at March 31	$ 3,888,000,000	$ 3,936,600,000