Pension Plans (Notes)	9 Months Ended
Jun. 28, 2014
Compensation and Retirement Disclosure [Abstract]
Pension and Other Postretirement Plans, Pensions, Policy [Policy Text Block]	14. Pension Plans Our pension plans are described in more detail in Note M to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2013. Amortization of Actuarial Losses In the nine months ended June 28, 2014, we recognized approximately $2.5 million ($1.6 million net of tax) of unrecognized actuarial losses as a component of net periodic pension cost. This amount has been reclassified from accumulated other comprehensive loss to net income in the accompanying Consolidated Statements of Operations and Comprehensive Income. Termination of U.S. Pension Plan We maintain a U.S. defined benefit pension plan (the Plan) that covers certain persons who were employees of Computervision Corporation (acquired by us in 1998). Benefits under the Plan were frozen in 1990. In the second quarter of 2014, we began the process of terminating the Plan, which will include settling Plan liabilities by offering lump sum distributions to plan participants and purchasing annuity contracts to cover vested benefits. We expect to execute the termination process over the next two years. As part of the planned termination, we re-balanced assets to a target asset allocation of 100% fixed income investments (up from 40%), which will provide a better matching of Plan assets to the characteristics of the liabilities. In the third quarter of 2014, we provided notice to plan participants of our intent to terminate the plan effective August 1, 2014 and we applied for a determination with the Internal Revenue Service with regards to the termination. We will take further actions to minimize the volatility of the value of our pension assets relative to pension liabilities and to settle remaining Plan liabilities, including making such contributions to the Plan as may be necessary to make the Plan sufficient to settle all Plan liabilities.

14. Pension Plans

Our pension plans are described in more detail in Note M to the Consolidated Financial Statements included in our Annual Report on Form 10-K for the fiscal year ended September 30, 2013.

Amortization of Actuarial Losses

In the nine months ended June 28, 2014, we recognized approximately $2.5 million ($1.6 million net of tax) of unrecognized actuarial losses as a component of net periodic pension cost. This amount has been reclassified from accumulated other comprehensive loss to net income in the accompanying Consolidated Statements of Operations and Comprehensive Income.

Termination of U.S. Pension Plan

We maintain a U.S. defined benefit pension plan (the Plan) that covers certain persons who were employees of Computervision Corporation (acquired by us in 1998). Benefits under the Plan were frozen in 1990. In the second quarter of 2014, we began the process of terminating the Plan, which will include settling Plan liabilities by offering lump sum distributions to plan participants and purchasing annuity contracts to cover vested benefits. We expect to execute the termination process over the next two years. As part of the planned termination, we re-balanced assets to a target asset allocation of 100% fixed income investments (up from 40%), which will provide a better matching of Plan assets to the characteristics of the liabilities. In the third quarter of 2014, we provided notice to plan participants of our intent to terminate the plan effective August 1, 2014 and we applied for a determination with the Internal Revenue Service with regards to the termination. We will take further actions to minimize the volatility of the value of our pension assets relative to pension liabilities and to settle remaining Plan liabilities, including making such contributions to the Plan as may be necessary to make the Plan sufficient to settle all Plan liabilities.