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EQUITY - Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Noncontrolling Interest [Line Items]
Total nonredeemable noncontrolling interests	$ 5,783	$ 5,476	$ 5,877	$ 5,426	$ 5,056	$ 4,943	$ 5,783	$ 5,426	$ 5,820	$ 3,117
Total net income available to nonredeemable noncontrolling interests	448	393	501	567	356	2,233
Noncontrolling Interests
Noncontrolling Interest [Line Items]
Total nonredeemable noncontrolling interests	1,769	1,727	1,696	1,592	1,581	1,490	1,769	1,592	1,649	$ 1,509
Total net income available to nonredeemable noncontrolling interests	106	$ 105	$ 95	95	$ 97	$ 82	306	274
Hospital Operations | Noncontrolling Interests
Noncontrolling Interest [Line Items]
Total nonredeemable noncontrolling interests	204						204		205
Total net income available to nonredeemable noncontrolling interests	9			14			33	35
Ambulatory Care | Noncontrolling Interests
Noncontrolling Interest [Line Items]
Total nonredeemable noncontrolling interests	1,565						1,565		$ 1,444
Total net income available to nonredeemable noncontrolling interests	$ 97			$ 81			$ 273	$ 239

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Amount of equity (deficit) attributable to parent and noncontrolling interest. Excludes temporary equity.

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