Debt	9 Months Ended
Jul. 01, 2016
Debt Disclosure [Abstract]
Debt	Note 9 – Debt U.S. Credit Facility On April 9, 2015, the Company amended its secured credit facility to extend the maturity to April 9, 2020, increase the amount available for borrowing under the secured revolving credit facility to $500 million, and provide for a delayed-draw term loan facility of $250 million (U.S. Term Loan, due 2020). The Company recorded $2.3 million in debt issuance costs. The credit facility is secured by substantially all the Company’s assets, and interest is based on standard inter-bank offering rates. The interest rate ranges from LIBOR plus 1.25% to LIBOR plus 2.00%. At July 1, 2016, the Company had $165.0 million outstanding under the secured credit facility at an interest rate of LIBOR plus 1.75%, which was 2.2%. Additionally, the Company had $5.0 million outstanding under the secured credit facility at an initial interest rate of prime plus 0.75%, which was 4.25%. Subsequent to July 1, 2016, the interest rate on the $5.0 million borrowing was reduced to LIBOR plus 1.75%. U.S. Term Loan, due July 2016 In April 2013, the Company amended the secured credit facility to provide for a $175.0 million term loan (U.S. Term Loan, due 2016). On April 8, 2015, the Company paid off the U.S. Term Loan, due 2016. In connection with the repayment, the Company wrote off $0.3 million in unamortized debt issuance costs as a loss on extinguishment of debt in the third fiscal quarter of 2015. U.S. Term Loan, due April 2020 On August 3, 2015, the Company borrowed $250 million under the U.S. Term Loan, due 2020, provided for under the amended secured credit facility. The interest rate on the U.S. Term Loan, due 2020, ranges from LIBOR plus 1.25% to LIBOR plus 2.00%. At July 1, 2016, the interest rate was LIBOR plus 1.75%, which equaled 2.2%. The loan amortizes at 1.25% of the original principal balance quarterly through March 2020, with the remaining balance due in April 2020. 7% Senior Notes, due August 2020 In August 2010, the Company issued $250.0 million in 7% Senior Notes, due August 2020 (2020 Notes) and which require semi-annual interest payments in March and September of each year until maturity. On August 4, 2015, the proceeds from the U.S. Term Loan, due August 2020, were used to redeem all of the 7% 2020 Notes. As part of the redemption, the Company incurred an $8.75 million redemption premium and wrote off $2.4 million in unamortized debt issuance costs as a loss on extinguishment of debt in the fourth fiscal quarter of 2015. 3.625% Senior Notes, due April 2023 In April 2015, the Company issued €330.0 million in 3.625% Notes, due 2023 requiring semi-annual interest payments in April and October of each year until maturity. The net proceeds from the sale of the notes, after deducting $5.9 million of debt issuance costs, were $350.8 million. The 2023 Notes are general unsecured senior obligations of the Company. The 2023 Notes are unconditionally guaranteed on a senior basis by the Company and certain subsidiaries of the Company that are guarantors under the Company’s existing secured credit facility. The 2023 Notes are subject to redemption at the option of the Company at any time prior to April 15, 2018, at a price equal to 100% of the principal amount, plus any accrued interest to the date of redemption and a make-whole provision. The Company may also redeem up to 35% of the 2023 Notes before April 15, 2018, with the net cash proceeds from equity offerings. The 2023 Notes are also subject to redemption at the option of the Company, in whole or in part, on or after April 15, 2018, at redemption prices starting at 102.719% of the principal amount plus accrued interest during the period beginning April 15, 2018, and declining annually to 100% of principal and accrued interest on or after April 15, 2021. Based on quoted market prices, the fair value of the Company’s 2023 Notes was $346.5 million as of July 1, 2016, and $347.7 million as of October 2, 2015. The carrying amount of the secured credit facility and the U.S. Term Loan, due 2020, approximate fair value. The estimate of fair value for the 2023 Notes is based on Level 2 inputs as defined in the fair value hierarchy described. Government refundable advances consist of payments received from the Canadian government to assist in research and development related to commercial aviation. The requirement to repay this advance is solely based on year-over-year commercial aviation revenue growth at CMC beginning in 2014. Imputed interest on the advance was 3.7% at July 1, 2016. The debt recognized was $45.3 million and $43.3 million as of July 1, 2016, and October 2, 2015, respectively. In April 2015, FASB amended requirements related to the presentation of debt issuance costs. The updated standard requires debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of being presented as an asset. The recognition and measurement of debt issuance costs are not affected by this amendment. The Company adopted this updated standard during the first fiscal quarter of 2016. The Company reclassified $6.5 million of debt issuance costs from other non-current assets to a reduction of the Company’s current maturities of long-term debt of $0.2 million and a reduction of the Company’s long-term debt of $6.3 million as of October 2, 2015.

Note 9 – Debt

U.S. Credit Facility

On April 9, 2015, the Company amended its secured credit facility to extend the maturity to April 9, 2020, increase the amount available for borrowing under the secured revolving credit facility to $500 million, and provide for a delayed-draw term loan facility of $250 million (U.S. Term Loan, due 2020). The Company recorded $2.3 million in debt issuance costs. The credit facility is secured by substantially all the Company’s assets, and interest is based on standard inter-bank offering rates. The interest rate ranges from LIBOR plus 1.25% to LIBOR plus 2.00%. At July 1, 2016, the Company had $165.0 million outstanding under the secured credit facility at an interest rate of LIBOR plus 1.75%, which was 2.2%. Additionally, the Company had $5.0 million outstanding under the secured credit facility at an initial interest rate of prime plus 0.75%, which was 4.25%. Subsequent to July 1, 2016, the interest rate on the $5.0 million borrowing was reduced to LIBOR plus 1.75%.

U.S. Term Loan, due July 2016

In April 2013, the Company amended the secured credit facility to provide for a $175.0 million term loan (U.S. Term Loan, due 2016). On April 8, 2015, the Company paid off the U.S. Term Loan, due 2016. In connection with the repayment, the Company wrote off $0.3 million in unamortized debt issuance costs as a loss on extinguishment of debt in the third fiscal quarter of 2015.

U.S. Term Loan, due April 2020

On August 3, 2015, the Company borrowed $250 million under the U.S. Term Loan, due 2020, provided for under the amended secured credit facility. The interest rate on the U.S. Term Loan, due 2020, ranges from LIBOR plus 1.25% to LIBOR plus 2.00%. At July 1, 2016, the interest rate was LIBOR plus 1.75%, which equaled 2.2%. The loan amortizes at 1.25% of the original principal balance quarterly through March 2020, with the remaining balance due in April 2020.

7% Senior Notes, due August 2020

In August 2010, the Company issued $250.0 million in 7% Senior Notes, due August 2020 (2020 Notes) and which require semi-annual interest payments in March and September of each year until maturity.

On August 4, 2015, the proceeds from the U.S. Term Loan, due August 2020, were used to redeem all of the 7% 2020 Notes. As part of the redemption, the Company incurred an $8.75 million redemption premium and wrote off $2.4 million in unamortized debt issuance costs as a loss on extinguishment of debt in the fourth fiscal quarter of 2015.

3.625% Senior Notes, due April 2023

In April 2015, the Company issued €330.0 million in 3.625% Notes, due 2023 requiring semi-annual interest payments in April and October of each year until maturity. The net proceeds from the sale of the notes, after deducting $5.9 million of debt issuance costs, were $350.8 million. The 2023 Notes are general unsecured senior obligations of the Company. The 2023 Notes are unconditionally guaranteed on a senior basis by the Company and certain subsidiaries of the Company that are guarantors under the Company’s existing secured credit facility. The 2023 Notes are subject to redemption at the option of the Company at any time prior to April 15, 2018, at a price equal to 100% of the principal amount, plus any accrued interest to the date of redemption and a make-whole provision. The Company may also redeem up to 35% of the 2023 Notes before April 15, 2018, with the net cash proceeds from equity offerings. The 2023 Notes are also subject to redemption at the option of the Company, in whole or in part, on or after April 15, 2018, at redemption prices starting at 102.719% of the principal amount plus accrued interest during the period beginning April 15, 2018, and declining annually to 100% of principal and accrued interest on or after April 15, 2021.

Based on quoted market prices, the fair value of the Company’s 2023 Notes was $346.5 million as of July 1, 2016, and $347.7 million as of October 2, 2015. The carrying amount of the secured credit facility and the U.S. Term Loan, due 2020, approximate fair value. The estimate of fair value for the 2023 Notes is based on Level 2 inputs as defined in the fair value hierarchy described.

Government refundable advances consist of payments received from the Canadian government to assist in research and development related to commercial aviation. The requirement to repay this advance is solely based on year-over-year commercial aviation revenue growth at CMC beginning in 2014. Imputed interest on the advance was 3.7% at July 1, 2016. The debt recognized was $45.3 million and $43.3 million as of July 1, 2016, and October 2, 2015, respectively.

In April 2015, FASB amended requirements related to the presentation of debt issuance costs. The updated standard requires debt issuance costs related to a recognized debt liability to be presented in the balance sheet as a direct deduction from the carrying amount of the related debt liability instead of being presented as an asset. The recognition and measurement of debt issuance costs are not affected by this amendment. The Company adopted this updated standard during the first fiscal quarter of 2016. The Company reclassified $6.5 million of debt issuance costs from other non-current assets to a reduction of the Company’s current maturities of long-term debt of $0.2 million and a reduction of the Company’s long-term debt of $6.3 million as of October 2, 2015.