BASIS OF PRESENTATION AND SIGNIFICANT EVENTS (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Receivables and Other [Line Items]
Accounts receivable		$ 2,238	$ 2,238	$ 1,056
Amortization of deferred costs		286	592
Forecast | Health Care Reform
Receivables and Other [Line Items]
Payment of annual health insurance industry fee	$ 1,200
Services Accounts Receivable
Receivables and Other [Line Items]
Accounts receivable		$ 147	$ 147