Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Sep. 30, 2011
Amortized intangible assets
Gross Carrying Amount	$ 1,185,011	$ 1,146,668
Accumulated Amortization	576,424	536,102
Unamortized intangible assets
Unamortized intangible assets, Total	195,425	187,969
Acquired in process research and development [Member]
Unamortized intangible assets
Unamortized intangible assets, Total	192,745	185,300
Trademarks [Member]
Unamortized intangible assets
Unamortized intangible assets, Total	2,680	2,669
Core and developed technology [Member]
Amortized intangible assets
Gross Carrying Amount	708,607	685,191
Accumulated Amortization	331,638	304,292
Product Rights [Member]
Amortized intangible assets
Gross Carrying Amount	156,802	152,140
Accumulated Amortization	6,534	1,268
Patents, trademarks, and other [Member]
Amortized intangible assets
Gross Carrying Amount	319,602	309,337
Accumulated Amortization	$ 238,252	$ 230,542