CONDENSED CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 169	$ 121	$ 328	$ 193
Other comprehensive income:
Amortization of net actuarial loss included in other non-operating expense, net	2	3	4	6
Unrealized gains on debt securities held as available-for-sale	0	0	1	0
Other comprehensive income before income taxes	2	3	5	6
Income tax expense related to items of other comprehensive income	(1)	(1)	(3)	(2)
Total other comprehensive income, net of tax	1	2	2	4
Comprehensive net income	170	123	330	197
Less: Comprehensive income attributable to noncontrolling interests	81	95	147	179
Comprehensive income available to Tenet Healthcare Corporation common shareholders	$ 89	$ 28	$ 183	$ 18