FAIR VALUE MEASUREMENTS - Recurring Fair Value Measurements (Details) - USD ($) $ in Millions	Dec. 31, 2022	Mar. 31, 2022
Assets:
Short-term investments	$ 268.6	$ 820.1
Total financial assets	853.0	2,619.1
Liabilities:
Contingent earn-out consideration	(60.1)	(66.0)
Contingent earn-out consideration	(26.6)	(43.0)
Convertible notes	(51.4)
Total financial liabilities	(140.3)	(109.2)
Money market funds
Assets:
Cash and cash equivalents	4.9	501.9
Restricted cash and cash equivalents	263.5	356.8
Restricted cash and cash equivalents, long term	109.1	103.5
Bank-time deposits
Assets:
Cash and cash equivalents	182.4	636.0
Short-term investments	18.7	131.8
Restricted cash and cash equivalents	0.5	0.5
Corporate bonds
Assets:
Cash and cash equivalents		2.8
Short-term investments	247.2	538.5
US Treasuries
Assets:
Cash and cash equivalents		52.0
Short-term investments		23.4
Commercial paper
Assets:
Cash and cash equivalents		119.4
Short-term investments	2.7	125.4
Certificates of Deposit
Assets:
Cash and cash equivalents		10.0
Short-term investments		1.0
Private equity
Assets:
Private equity	24.0	16.1
Foreign currency forward contracts
Liabilities:
Foreign currency forward contracts	(2.2)	(0.2)
Quoted prices in active markets for identical assets (level 1)
Assets:
Total financial assets	579.1	1,805.9
Liabilities:
Contingent earn-out consideration	0.0	0.0
Contingent earn-out consideration	0.0	0.0
Convertible notes	0.0
Total financial liabilities	0.0	0.0
Quoted prices in active markets for identical assets (level 1) | Money market funds
Assets:
Cash and cash equivalents	4.9	501.9
Restricted cash and cash equivalents	263.5	356.8
Restricted cash and cash equivalents, long term	109.1	103.5
Quoted prices in active markets for identical assets (level 1) | Bank-time deposits
Assets:
Cash and cash equivalents	182.4	636.0
Short-term investments	18.7	131.8
Restricted cash and cash equivalents	0.5	0.5
Quoted prices in active markets for identical assets (level 1) | Corporate bonds
Assets:
Cash and cash equivalents		0.0
Short-term investments	0.0	0.0
Quoted prices in active markets for identical assets (level 1) | US Treasuries
Assets:
Cash and cash equivalents		52.0
Short-term investments		23.4
Quoted prices in active markets for identical assets (level 1) | Commercial paper
Assets:
Cash and cash equivalents		0.0
Short-term investments	0.0	0.0
Quoted prices in active markets for identical assets (level 1) | Certificates of Deposit
Assets:
Cash and cash equivalents		0.0
Short-term investments		0.0
Quoted prices in active markets for identical assets (level 1) | Private equity
Assets:
Private equity	0.0	0.0
Quoted prices in active markets for identical assets (level 1) | Foreign currency forward contracts
Liabilities:
Foreign currency forward contracts	0.0	0.0
Significant other observable inputs (level 2)
Assets:
Total financial assets	249.9	797.1
Liabilities:
Contingent earn-out consideration	0.0	0.0
Contingent earn-out consideration	0.0	0.0
Convertible notes	(51.4)
Total financial liabilities	(53.6)	(0.2)
Significant other observable inputs (level 2) | Money market funds
Assets:
Cash and cash equivalents	0.0	0.0
Restricted cash and cash equivalents	0.0	0.0
Restricted cash and cash equivalents, long term	0.0	0.0
Significant other observable inputs (level 2) | Bank-time deposits
Assets:
Cash and cash equivalents	0.0	0.0
Short-term investments	0.0	0.0
Restricted cash and cash equivalents	0.0	0.0
Significant other observable inputs (level 2) | Corporate bonds
Assets:
Cash and cash equivalents		2.8
Short-term investments	247.2	538.5
Significant other observable inputs (level 2) | US Treasuries
Assets:
Cash and cash equivalents		0.0
Short-term investments		0.0
Significant other observable inputs (level 2) | Commercial paper
Assets:
Cash and cash equivalents		119.4
Short-term investments	2.7	125.4
Significant other observable inputs (level 2) | Certificates of Deposit
Assets:
Cash and cash equivalents		10.0
Short-term investments		1.0
Significant other observable inputs (level 2) | Private equity
Assets:
Private equity	0.0	0.0
Significant other observable inputs (level 2) | Foreign currency forward contracts
Liabilities:
Foreign currency forward contracts	(2.2)	(0.2)
Significant unobservable inputs (level 3)
Assets:
Total financial assets	24.0	16.1
Liabilities:
Contingent earn-out consideration	(60.1)	(66.0)
Contingent earn-out consideration	(26.6)	(43.0)
Convertible notes	0.0
Total financial liabilities	(86.7)	(109.0)
Significant unobservable inputs (level 3) | Money market funds
Assets:
Cash and cash equivalents	0.0	0.0
Restricted cash and cash equivalents	0.0	0.0
Restricted cash and cash equivalents, long term	0.0	0.0
Significant unobservable inputs (level 3) | Bank-time deposits
Assets:
Cash and cash equivalents	0.0	0.0
Short-term investments	0.0	0.0
Restricted cash and cash equivalents	0.0	0.0
Significant unobservable inputs (level 3) | Corporate bonds
Assets:
Cash and cash equivalents		0.0
Short-term investments	0.0	0.0
Significant unobservable inputs (level 3) | US Treasuries
Assets:
Cash and cash equivalents		0.0
Short-term investments		0.0
Significant unobservable inputs (level 3) | Commercial paper
Assets:
Cash and cash equivalents		0.0
Short-term investments	0.0	0.0
Significant unobservable inputs (level 3) | Certificates of Deposit
Assets:
Cash and cash equivalents		0.0
Short-term investments		0.0
Significant unobservable inputs (level 3) | Private equity
Assets:
Private equity	24.0	16.1
Significant unobservable inputs (level 3) | Foreign currency forward contracts
Liabilities:
Foreign currency forward contracts	$ 0.0	$ 0.0