Debt and Borrowings - Convertible Senior Notes (Details) $ / shares in Units, shares in Millions	Dec. 06, 2024 USD ($) Tradingday $ / shares shares	Sep. 24, 2021 USD ($)	Nov. 30, 2020 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)
2030 Notes, principal
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount	$ 1,400,000,000
Debt stated percentage	0.00%			0.00%
Proceeds from Issuance of Senior Long-Term Debt	$ 1,380,000,000
Debt issuance costs	$ 24,000,000.0
Debt initial conversion rate	0.0083718
Initial conversion price per share (dollars per share) | $ / shares	$ 119.45
Notes issued upon conversion (in shares) | shares	11.7
Redemption period, start date	Dec. 01, 2027
Debt instrument threshold percentage of conversion price (in shares)	130.00%
Number of trading days for conversion of notes | Tradingday	20
Number of consecutive trading days for conversion of notes | Tradingday	30
Redemption price percentage of principal amount redeemed (in shares)	100.00%
Sinking fund	$ 0
Debt convertible date	Jan. 01, 2030
Debt instrument denomination of principal amount for conversion into common stock	$ 1,000
Number of business day period for conversion of notes	5 years
Number of consecutive trading day period in consideration for conversion of notes	5 years
Threshold percentage of stock price trigger in measurement period	98.00%
Debt conversion rate in make whole	2.9301
Debt conversion price per share in make whole (dollars per share) | $ / shares	$ 88.48
Debt default threshold principal amount percentage	100.00%
2027 Notes, principal
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount		$ 575,000,000.0
Debt stated percentage		0.00%		0.00%
Proceeds from Issuance of Senior Long-Term Debt		$ 560,100,000
Debt issuance costs		$ 14,900,000
Repurchased face amount	$ 451,500,000
Aggregate cash repurchase price	408,600,000
Carrying amount	446,500,000
Unamortized issuance cost	5,000,000.0
Gain on extinguishment of debt	37,900,000
2025 Notes, principal
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount			$ 1,150,000,000
Debt stated percentage			0.00%	0.00%
Proceeds from Issuance of Senior Long-Term Debt			$ 1,130,000,000
Debt issuance costs			$ 20,600,000
Repurchased face amount	133,900,000					$ 982,700,000
Aggregate cash repurchase price	130,800,000
Carrying amount	133,400,000
Unamortized issuance cost	500,000
Gain on extinguishment of debt	$ 2,600,000
Long term debt, gross				$ 1,600,000,000	$ 1,600,000,000