Cover Page - USD ($) shares in Thousands, $ in Billions	12 Months Ended
	Dec. 31, 2022	Feb. 10, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-31719
Entity Registrant Name	MOLINA HEALTHCARE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-4204626
Entity Address, Address Line One	200 Oceangate
Entity Address, Address Line Two	Suite 100
Entity Address, City or Town	Long Beach
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90802
City Area Code	562
Local Phone Number	435-3666
Title of 12(b) Security	Common Stock, $0.001 Par Value
Trading Symbol	MOH
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 16.1
Entity Common Stock, Shares Outstanding		57,900
Documents Incorporated by Reference	Portions of the registrant’s Proxy Statement for the 2023 Annual Meeting of Stockholders to be held on May 3, 2023, are incorporated by reference into Part III of this Form 10-K, to the extent described therein.
Entity Central Index Key	0001179929
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY