BASIS OF PRESENTATION - Other Current Asset (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Accounts receivable and allowance for doubtful accounts
Prepaid expenses	$ 375	$ 391
Contract assets	194	208
California provider fee program receivables	3,148	2,914
Receivables from other government programs	240	282
Guarantees	248	274
Non-patient receivables	315	260
Other	98	95
Total other current assets	1,775	1,839
California's Provider Fee Program
Accounts receivable and allowance for doubtful accounts
California provider fee program receivables	$ 305	$ 329