PROPERTY AND PROFESSIONAL AND GENERAL LIABILITY INSURANCE - Property Insurance (Details) - Scenario, Forecast $ in Millions	12 Months Ended
	Mar. 31, 2022 USD ($)
Insurance coverage
Property insurance, annual coverage limit	$ 850
Floods
Insurance coverage
Property insurance, maximum coverage per incident	100
Earthquake
Insurance coverage
Property insurance, maximum coverage per incident	200
Property insurance, deductible	40
Windstorms
Insurance coverage
Property insurance, maximum coverage per incident	200
Fire and other perils
Insurance coverage
Property insurance, maximum coverage per incident	$ 850
Flood, earthquake and windstorm
Insurance coverage
Insurance deductible as a percent	5.00%
Flood and windstorm
Insurance coverage
Property insurance, deductible	$ 25
New Madrid Fault Earthquakes
Insurance coverage
Insurance deductible as a percent	2.00%
Property insurance, deductible	$ 25
Other Catastrophic Events
Insurance coverage
Property insurance, deductible	$ 1