Investments - Length of Contractual Maturities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	$ 1,034,222	$ 1,604,885
Within 1 year, fair value	1,030,270	1,599,650
Greater than 1 year, less than or equal to 5 years, amortized cost	265,055	302,370
Greater than 1 year, less than or equal to 5 years, fair value	259,650	299,562
Amortized Cost	1,299,277	1,907,255
Fair Value	1,289,920	1,899,212
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	97,399	317,331
Within 1 year, fair value	97,224	316,416
Greater than 1 year, less than or equal to 5 years, amortized cost	0	0
Greater than 1 year, less than or equal to 5 years, fair value	0	0
Amortized Cost	97,399	317,331
Fair Value	97,224	316,416
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	173,523	206,208
Within 1 year, fair value	171,634	204,614
Greater than 1 year, less than or equal to 5 years, amortized cost	87,104	165,699
Greater than 1 year, less than or equal to 5 years, fair value	85,138	164,057
Amortized Cost	260,627	371,907
Fair Value	256,772	368,671
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	320,882	708,694
Within 1 year, fair value	320,595	707,565
Greater than 1 year, less than or equal to 5 years, amortized cost	0	0
Greater than 1 year, less than or equal to 5 years, fair value	0	0
Amortized Cost	320,882	708,694
Fair Value	320,595	707,565
Agency bonds
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	130,176
Within 1 year, fair value	130,165
Greater than 1 year, less than or equal to 5 years, amortized cost	15,136
Greater than 1 year, less than or equal to 5 years, fair value	14,976
Amortized Cost	145,312
Fair Value	145,141
Government bonds, Non-US
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	4,063	11,895
Within 1 year, fair value	3,996	11,813
Greater than 1 year, less than or equal to 5 years, amortized cost	5,267	6,301
Greater than 1 year, less than or equal to 5 years, fair value	5,155	6,142
Amortized Cost	9,330	18,196
Fair Value	9,151	17,955
Government bonds, US
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	308,179	360,757
Within 1 year, fair value	306,656	359,242
Greater than 1 year, less than or equal to 5 years, amortized cost	136,679	78,190
Greater than 1 year, less than or equal to 5 years, fair value	134,440	77,685
Amortized Cost	444,858	438,947
Fair Value	441,096	436,927
Securitization notes receivable and certificates
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	0	0
Within 1 year, fair value	0	0
Greater than 1 year, less than or equal to 5 years, amortized cost	19,841	52,180
Greater than 1 year, less than or equal to 5 years, fair value	18,913	51,678
Amortized Cost	19,841	52,180
Fair Value	18,913	51,678
Other
Debt Securities, Available-for-sale [Line Items]
Within 1 year, amortized cost	0
Within 1 year, fair value	0
Greater than 1 year, less than or equal to 5 years, amortized cost	1,028
Greater than 1 year, less than or equal to 5 years, fair value	1,028
Amortized Cost	1,028
Fair Value	1,028
Certificates of deposit, corporate bonds, US government bonds and commercial paper \| Cash Equivalents
Debt Securities, Available-for-sale [Line Items]
Fair Value	$ 115,300	$ 303,800

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