Subsequent Events	12 Months Ended
Sep. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	20. Subsequent Events Credit Facility Revolving Loan Repayment On October 27, 2020, we repaid the $18 million outstanding balance on our revolving credit facility. Stock Repurchase Authorization On November 13, 2020, the Board of Directors authorized us to repurchase $1 billion of our common stock through September 30, 2023. Equity Grants In November 2020, we granted shares valued at approximately $14.0 million to our employees, including our executive officers ($2.6 million), in payment of amounts earned under our annual Corporate Incentive Plan. In November 2020, we granted service-based restricted stock units (RSUs) valued at approximately $53.0 million to employees, including our executive officers ($19.6 million). The service-based RSUs will generally vest in three substantially equal annual installments on November 15, 2021, 2022 and 2023. In November 2020, we granted performance-based restricted stock units (RSUs) valued at approximately $17.0 million to executive officers. The performance-based RSUs will generally vest in three substantially equal annual installments on November 15, 2021, 2022 and 2023.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6842918&loc=SL6314017-165662

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