Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash Flows from Operating Activities
Net income	$ 4,088.6	$ 4,347.7	$ 5,069.5
Adjustments to Reconcile Net Income to Cash Flows from Operating Activities:
Depreciation and amortization	1,462.2	1,373.6	1,328.2
Changes in deferred income taxes	126.0	(268.5)	559.7
Stock-based compensation expense	141.5	147.4	231.0
Impairment charges, indefinite lived intangibles	205.0	151.5	0
Acquired in-process research and development, net of tax	0	252.2	32.5
Income related to prepayment of revenue-sharing obligation	(787.8)	0	0
Other operating activities, net	120.5	(17.8)	(178.6)
Changes in operating assets and liabilities, net of acquisitions
Receivables - (increase) decrease	361.8	(188.8)	(319.1)
Inventories - (increase) decrease	(307.9)	203.1	157.0
Other assets - (increase) decrease	231.0	642.7	340.5
Accounts payable and other liabilties-increase (decrease)	(336.1)	591.4	(363.9)
Net Cash Provided by Operating Activities	5,304.8	7,234.5	6,856.8
Cash Flows from Investing Activities
Purchases of property and equipment	(905.4)	(672.0)	(694.3)
Disposals of property and equipment	22.0	25.3	24.6
Net change in short-term investments	375.1	(250.9)	(686.5)
Proceeds from sales and maturities of noncurrent investments	4,355.7	2,138.5	584.7
Purchases of noncurrent investments	(7,618.6)	(4,459.4)	(1,067.2)
Purchase of product rights	(138.8)	(632.9)	(442.4)
Purchases of in-process research and development	0	(388.0)	(50.0)
Cash paid for acquisition, net of cash acquired	(199.3)	(307.8)	(609.4)
Net change in loan to collaboration partner	165.0	(165.0)	0
Proceeds from prepayment of revenue-sharing obligation	1,212.1	0	0
Other investing activities, net	(100.6)	(112.2)	(219.3)
Net Cash Used for Investing Activities	(2,832.8)	(4,824.4)	(3,159.8)
Cash Flows from Financing Activities
Dividends paid	(2,187.4)	(2,180.1)	(2,165.3)
Net change in short-term borrowings	(10.5)	(141.2)	125.1
Repayments of long-term debt	(1,500.6)	(54.6)	(1.1)
Purchases of common stock	(721.1)	0	0
Other financing activities, net	0	6.0	19.4
Net Cash Used for Financing Activities	(4,419.6)	(2,369.9)	(2,021.9)
Effect of exchange rate on cash and cash equivalents	43.9	(110.9)	(144.8)
Net increase (decrease) in cash and cash equivalents	(1,903.7)	(70.7)	1,530.3
Cash and cash equivalents at beginning of year	5,922.5	5,993.2	4,462.9
Cash and Cash Equivalents at End of Year	$ 4,018.8	$ 5,922.5	$ 5,993.2