Intangible Assets - Components of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,346,048	$ 1,146,668
Accumulated Amortization	597,179	536,102
Unamortized intangible assets, Total	63,815	187,969
Acquired in-process research and development [Member]
Finite-Lived Intangible Assets [Line Items]
Unamortized intangible assets, Total	61,138	185,300
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Unamortized intangible assets, Total	2,677	2,669
Core and developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	856,585	685,191
Accumulated Amortization	344,911	304,292
Product rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	163,465	152,140
Accumulated Amortization	12,232	1,268
Patents, trademarks, and other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	325,998	309,337
Accumulated Amortization	$ 240,036	$ 230,542