| Document And Entity Information | Nov. 18, 2024 |
| Document Information [Line Items] | |
| Entity, Registrant Name | MOLINA HEALTHCARE, INC. |
| Document, Type | 8-K |
| Document, Period End Date | Nov. 18, 2024 |
| Entity, Incorporation, State or Country Code | DE |
| Entity, File Number | 001-31719 |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | MOH |
| Security Exchange Name | NYSE |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0001179929 |
