CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Sep. 30, 2021	Mar. 31, 2021
Reconciliation of cash, cash equivalents, and restricted cash to the consolidated balance sheets
Cash and cash equivalents of continuing operations	$ 1,936,291	$ 227,427
Cash and cash equivalents included in assets held for sale		45,000
Short-term restricted cash included in prepaid expenses and other current assets	3,567	7,145
Long-term restricted cash included in other assets	9,095	5,761
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 1,948,953	$ 285,333	$ 345,811
Restricted Cash, Current, Statement of Financial Position	Prepaid expenses and other current assets		Prepaid expenses and other current assets
Restricted Cash, Noncurrent, Statement of Financial Position	Other assets		Other assets