Income Taxes (Summary Of Federal Income Tax Rate And Effective Income Tax Rate) (Details)	12 Months Ended
Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Income Tax Disclosure [Abstract]
Statutory federal income tax rate	35.00%	35.00%	35.00%
Change in valuation allowance	(32.00%)	103.00%	3.00%
State income taxes, net of federal tax benefit	1.00%	0.00%	(2.00%)
Federal and state research and development credits	(1.00%)	(1.00%)	(5.00%)
Tax audit and examination settlements	(1.00%)	1.00%	0.00%
Foreign rate differences	(26.00%)	(16.00%)	(15.00%)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Withholding, Percent	5.00%	3.00%	0.00%
Subsidiary reorganization	0.00%	3.00%	1.00%
Other, net	5.00%	1.00%	1.00%
Effective income tax rate	(14.00%)	129.00%	18.00%

Effective Income Tax Rate Reconciliation, Foreign Income Tax Withholding, Percent

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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