Subsequent Events	9 Months Ended
Subsequent Events	Jun. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Underwriters’ Option to Purchase Additional Shares of Class A Common Stock In connection with the Company’s initial public offering, the underwriters exercised their option to purchase 11,550,000 additional shares of Class A Common Stock from certain selling stockholders on July 2, 2020, which settled on July 7, 2020. As a result, there are 421,450,000 shares of Class B Common Stock issued and outstanding and 88,550,000 shares of Class A Common Stock issued and outstanding as of August 4, 2020. 3.875% Senior Secured Notes and 2.750% Senior Secured Notes Offerings On June 29, 2020, Acquisition Corp. issued and sold $535 million in aggregate principal amount of 3.875% Senior Secured Notes due 2030 (the “3.875% Senior Secured Notes”) and €325 million in aggregate principal amount of 2.750% Senior Secured Notes due 2028 (the “2.750% Senior Secured Notes”). Net proceeds of the offerings were used to redeem €311 million of the 4.125% Senior Secured Notes and $220 million of the 4.875% Senior Secured Notes (as described below), constituting the redemption of all of the outstanding aggregate principal amount of the 4.125% Senior Secured Notes and the 4.875% Senior Secured Notes, and the remaining proceeds were used towards the tender offer for $300 million aggregate principal amount of 5.000% Senior Secured Notes, $244 million of which was tendered and accepted on June 29, 2020 and $295,000 of which was tendered and accepted on July 14, 2020. The remainder of the 5.000% Senior Secured Notes not tendered in the tender offer were redeemed on August 1, 2020 (as described below). Interest on the 3.875% Senior Secured Notes will accrue at the rate of 3.875% per annum and will be payable semi-annually in arrears on January 15 and July 15, commencing on January 15, 2021. Interest on the 2.750% Senior Secured Notes will accrue at the rate of 2.750% per annum and will be payable semi-annually in arrears on January 15 and July 15, commencing on January 15, 2021. The 3.875% Senior Secured Notes and the 2.750% Senior Secured Notes are fully and unconditionally guaranteed on a senior secured basis by each of Acquisition Corp.’s existing direct or indirect wholly-owned domestic restricted subsidiaries and by any such subsidiaries that guarantee obligations of Acquisition Corp. under its existing credit facilities, subject to customary exceptions. The indentures governing the 3.875% Senior Secured Notes and the 2.750% Senior Secured Notes (collectively, the “New Secured Notes Indenture”) do not contain many of the restrictive covenants, certain events of default and other related provisions contained in the indentures previously governing the 4.125% Senior Secured Notes and 4.875% Senior Secured Notes. The New Secured Notes Indenture contains covenants limiting, among other things, Acquisition Corp.’s ability and the ability of most of its subsidiaries to create liens and consolidate, merge, sell or otherwise dispose of all or substantially all of its assets. Redemption of 4.125% Senior Secured Notes and 4.875% Senior Secured Notes On June 30, 2020, Acquisition Corp. redeemed in full all of the outstanding aggregate principal amount of the 4.125% Senior Secured Notes and 4.875% Senior Secured Notes, equal to €311 million aggregate principal amount of the 4.125% Senior Secured Notes and $220 million aggregate principal amount of the 4.875% Senior Secured Notes, using a portion of the proceeds from the offering of 3.875% Senior Secured Notes and 2.750% Senior Secured Notes described above. The redemption price for the 4.125% Senior Secured Notes was approximately €322 million, equivalent to 103.094% of the principal amount of the 4.125% Senior Secured Notes, plus accrued but unpaid interest thereon to, but excluding, the redemption date, which was June 30, 2020. The redemption price for the 4.875% Senior Secured Notes was approximately $230 million, equivalent to 103.656% of the principal amount of the 4.875% Senior Secured Notes, plus accrued but unpaid interest thereon to, but excluding, the redemption date, which was June 30, 2020. The Company expects to record a loss on extinguishment of debt of approximately $23 million in the fourth quarter of fiscal year 2020 as a result of these redemptions, which represents the premium paid on early redemption and unamortized deferred financing costs. Tender Offer and Redemption of 5.000% Senior Secured Notes On June 16, 2020, Acquisition Corp. announced a cash tender offer to purchase any and all of the 5.000% Senior Secured Notes. On June 30, 2020, Acquisition Corp. announced that $244 million of the aggregate principal amount of $300 million outstanding had tendered and been accepted in the tender offer. Also on June 30, 2020, Acquisition Corp. issued a notice of redemption calling the remaining outstanding 5.000% Senior Secured Notes not tendered in the tender offer for redemption on August 1, 2020. An additional $295,000 tendered and was accepted in the tender offer on July 14, 2020 and Acquisition Corp. redeemed all 5.000% Senior Secured Notes that were not tendered and accepted for purchase in the tender offer and consent solicitation on August 1, 2020 at the then-applicable redemption price of 101.250%. The Company expects to record a loss on extinguishment of debt of approximately $7 million in the fourth quarter of fiscal year 2020 as a result of this tender offer and redemption, which represents the premium to tender and unamortized deferred financing costs.