EQUITY METHOD INVESTMENT - Summary of Balances Sheets and Income Statement (Details) - Kindred at Home - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019
Balance sheets
Current assets	$ 536	$ 563
Non-current assets	4,955	4,967
Current liabilities	351	405
Non-current liabilities	2,708	2,637
Shareholders' equity	2,432	2,488
Statements of income
Revenues	1,587	3,100
Expenses	1,451	2,835
Net income	$ 27	$ 54