Supplemental Balance Sheet Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for doubtful accounts
Beginning balance	$ 125	$ 125	$ 110	$ 131
Net (credits) charges to expenses		11	27	27
Utilization of allowances		(13)	(15)	(14)
Ending balance		116	125	110
Trade accounts receivable, net
Accounts receivable		1,362	1,445
Less: allowance for doubtful accounts		(81)	(83)
Less: allowance for sales returns		(35)	(42)
Trade accounts receivable, net		1,246	1,320
Inventories
Finished goods		637	622
Work-in-process		71	95
Raw materials		223	177
Inventories		931	894
Property, plant and equipment, net
Land		111	119
Buildings and improvements		923	919
Equipment, furniture and fixtures		1,919	1,889
Capital in progress		230	241
Property, plant and equipment		3,183	3,168
Less: accumulated depreciation		1,513	1,471
Property, plant and equipment, net		1,670	1,697	1,722
Accrued expenses
Legal reserves		129	441
Payroll and related liabilities		466	436
Accrued contingent consideration		37	9
Other		695	740
Accrued expenses		1,327	1,626
Other long-term liabilities
Legal reserves		170	147
Accrued income taxes		1,095	1,062
Accrued contingent consideration		321	62
Other Long-Term Liabilities		422	374
Other long-term liabilities		2,008	1,645
Supplemental Balance Sheet Information (Textuals) [Abstract]
Bad debt expense reversed	20
Allowance for Doubtful Accounts [Member]
Allowance for doubtful accounts
Beginning balance	83	83	71	58
Net (credits) charges to expenses		11	27	27
Utilization of allowances		(13)	(15)	(14)
Ending balance		$ 81	$ 83	$ 71