Subsequent Events	12 Months Ended
Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Events	17. Subsequent Events California Headquarters Lease As of October 7, 2016, we entered into a lease agreement for new office space located in the Ford Factory Building at 777 S. Santa Fe Avenue, Los Angeles, California, 90021, to be used as our new Los Angeles, California headquarters beginning on August 1, 2017 for an initial term of 12 years and 9 months with a single option to extend the term of the lease for 10 years. Rental payments under the Lease will total approximately $10.0 million per year, subject to annual fixed increases, excluding rent abatement of 75% for 16 months beginning in month two of the Lease term. We also own other property and lease facilities elsewhere throughout the world as necessary to operate our businesses. We consider our properties adequate for our current needs October 2016 Refinancing Transactions On October 18, 2016, Acquisition Corp. issued €345 million in aggregate principal amount of its 4.125% Senior Secured Notes due 2024 and $250 million in aggregate principal amount of its 4.875% Senior Secured Notes due 2024. Acquisition Corp. used the net proceeds to pay the consideration in the tender offers and satisfy and discharge its 2021 Senior Secured Notes as described below. See “Financial Condition and Liquidity” for more information. On October 18, 2016, Acquisition Corp. accepted for purchase in connection with tender offers for its 6.000% Senior Secured Notes due 2021 (the “Existing Dollar Notes”) and 6.250% Senior Secured Notes due 2021 (the “Existing Euro Notes” and, together with the Existing Dollar Notes, the “2021 Senior Secured Notes”) the 2021 Senior Secured Notes that had been validly tendered and not validly withdrawn at or prior to 5:00 p.m., New York City time on October 17, 2016 (the “Expiration Time”). Acquisition Corp. then issued a notice of redemption on October 18, 2016 with respect to the remaining 2021 Senior Secured Notes not accepted for payment pursuant to the tender offers. Following payment of the 2021 Senior Secured Notes tendered at or prior to the Expiration Time, Acquisition Corp. deposited with the Trustee for the 2021 Senior Secured Notes not accepted for purchase in the tender offers funds sufficient to satisfy all obligations remaining to the date of redemption, which redemption date will be January 15, 2017, under the applicable indenture governing the 2021 Senior Secured Notes. These transactions are collectively referred to as the “October 2016 Refinancing Transactions.” The Company expects to record a loss on extinguishment of debt of approximately $31 million in the first quarter of fiscal 2017 as a result of the October 2016 Refinancing Transactions, which represents the premium paid on early redemption and unamortized deferred financing costs. November 2016 Senior Term Loan Credit Agreement Amendment On November 21, 2016, Acquisition Corp received lender consent to an amendment (the “November 2016 Senior Term Loan Amendment”) to the Senior Term Loan Credit Agreement governing Acquisition Corp.’s Senior Term Loan Facility, which extended the maturity date of the Senior Term Loan Credit Agreement to November 1, 2023, subject, in certain circumstances, to a springing maturity inside the maturity date of certain of Acquisition Corp.’s other outstanding indebtedness and increased the principal amount outstanding by $27.5 million to $1,006 million. 5.625% Existing Secured Notes Redemption On November 21, 2016, Acquisition Corp. redeemed 10%, or $27.5 million of its 5.625% Senior Secured Notes due 2022 (the “5.625% Secured Notes”). The redemption price was equal to 103% of the principal amount of the 5.625% Secured Notes, plus accrued and unpaid interest to, but not including the redemption date. Following the partial redemption by Acquisition Corp. of the 5.625% Secured Notes, $247,500,000 of the 5.625% Secured Notes remain outstanding.

17. Subsequent Events

California Headquarters Lease

As of October 7, 2016, we entered into a lease agreement for new office space located in the Ford Factory Building at 777 S. Santa Fe Avenue, Los Angeles, California, 90021, to be used as our new Los Angeles, California headquarters beginning on August 1, 2017 for an initial term of 12 years and 9 months with a single option to extend the term of the lease for 10 years. Rental payments under the Lease will total approximately $10.0 million per year, subject to annual fixed increases, excluding rent abatement of 75% for 16 months beginning in month two of the Lease term. We also own other property and lease facilities elsewhere throughout the world as necessary to operate our businesses. We consider our properties adequate for our current needs

October 2016 Refinancing Transactions

On October 18, 2016, Acquisition Corp. issued €345 million in aggregate principal amount of its 4.125% Senior Secured Notes due 2024 and $250 million in aggregate principal amount of its 4.875% Senior Secured Notes due 2024. Acquisition Corp. used the net proceeds to pay the consideration in the tender offers and satisfy and discharge its 2021 Senior Secured Notes as described below. See “Financial Condition and Liquidity” for more information.

On October 18, 2016, Acquisition Corp. accepted for purchase in connection with tender offers for its 6.000% Senior Secured Notes due 2021 (the “Existing Dollar Notes”) and 6.250% Senior Secured Notes due 2021 (the “Existing Euro Notes” and, together with the Existing Dollar Notes, the “2021 Senior Secured Notes”) the 2021 Senior Secured Notes that had been validly tendered and not validly withdrawn at or prior to 5:00 p.m., New York City time on October 17, 2016 (the “Expiration Time”). Acquisition Corp. then issued a notice of redemption on October 18, 2016 with respect to the remaining 2021 Senior Secured Notes not accepted for payment pursuant to the tender offers. Following payment of the 2021 Senior Secured Notes tendered at or prior to the Expiration Time, Acquisition Corp. deposited with the Trustee for the 2021 Senior Secured Notes not accepted for purchase in the tender offers funds sufficient to satisfy all obligations remaining to the date of redemption, which redemption date will be January 15, 2017, under the applicable indenture governing the 2021 Senior Secured Notes. These transactions are collectively referred to as the “October 2016 Refinancing Transactions.” The Company expects to record a loss on extinguishment of debt of approximately $31 million in the first quarter of fiscal 2017 as a result of the October 2016 Refinancing Transactions, which represents the premium paid on early redemption and unamortized deferred financing costs.

November 2016 Senior Term Loan Credit Agreement Amendment

On November 21, 2016, Acquisition Corp received lender consent to an amendment (the “November 2016 Senior Term Loan Amendment”) to the Senior Term Loan Credit Agreement governing Acquisition Corp.’s Senior Term Loan Facility, which extended the maturity date of the Senior Term Loan Credit Agreement to November 1, 2023, subject, in certain circumstances, to a springing maturity inside the maturity date of certain of Acquisition Corp.’s other outstanding indebtedness and increased the principal amount outstanding by $27.5 million to $1,006 million.

5.625% Existing Secured Notes Redemption

On November 21, 2016, Acquisition Corp. redeemed 10%, or $27.5 million of its 5.625% Senior Secured Notes due 2022 (the “5.625% Secured Notes”). The redemption price was equal to 103% of the principal amount of the 5.625% Secured Notes, plus accrued and unpaid interest to, but not including the redemption date. Following the partial redemption by Acquisition Corp. of the 5.625% Secured Notes, $247,500,000 of the 5.625% Secured Notes remain outstanding.