Debt - Prior Senior Credit Facilities (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Jul. 01, 2022
Line of Credit Facility [Line Items]
Debt extinguishment costs	$ (6,835,000)	$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Aggregate principal amount				$ 350,000,000
Letter of Credit
Line of Credit Facility [Line Items]
Aggregate principal amount				$ 50,000,000
Bank of America, N.A.
Line of Credit Facility [Line Items]
Swing loan sub-facility maximum initial borrowing capacity			$ 20,000,000
Bank of America, N.A. | Senior Secured Credit Facility
Line of Credit Facility [Line Items]
Aggregate principal amount			2,400,000,000
Debt extinguishment costs	$ (17,000,000)
Bank of America, N.A. | Term A Loan
Line of Credit Facility [Line Items]
Aggregate principal amount			$ 1,255,000,000
Debt agreement term			5 years
Bank of America, N.A. | Term B Loan
Line of Credit Facility [Line Items]
Aggregate principal amount			$ 720,000,000
Debt agreement term			7 years
Bank of America, N.A. | Revolving Credit Facility
Line of Credit Facility [Line Items]
Aggregate principal amount			$ 450,000,000
Debt agreement term			5 years
Bank of America, N.A. | Letter of Credit
Line of Credit Facility [Line Items]
Aggregate principal amount			$ 25,000,000