Number of Property Leased

No definition available.

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- Definition

Operating Lease, Number of Renewal Option

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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Period Type:	instant

- Definition

Operating Leases, Annual Rental Payments Increase Percentage

+ References

No definition available.

+ Details

Name:	moh_OperatingLeasesAnnualRentalPaymentsIncreasePercentage
Namespace Prefix:	moh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Sale Leaseback Transaction, Annual Rental Payments Increase Percentage

+ References

No definition available.

+ Details

Name:	moh_SaleLeasebackTransactionAnnualRentalPaymentsIncreasePercentage
Namespace Prefix:	moh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Sale Leaseback Transaction, Lease Renewal Term

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Sale Leaseback Transaction, Number Of Extension

+ References

No definition available.

+ Details

Name:	moh_SaleLeasebackTransactionNumberOfExtension
Namespace Prefix:	moh_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

The amount, during the lease term, of each minimum [capital] lease payment allocated to interest expense so as to produce a constant periodic rate of interest on the remaining balance of the capital lease obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 35
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=77915053&loc=d3e43161-112731

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=us-gaap_PropertySubjectToOperatingLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=moh_A6thPineDevelopmentLLCMember
Namespace Prefix:
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Period Type:

Debt - Lease Financing Obligations and Debt Committment Letter (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) Lease_Renewal_Option extension property	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Debt Instrument [Line Items]
Interest expense under leases \| $	$ 17	$ 17	$ 17
Molina Center And Ohio Exchange
Debt Instrument [Line Items]
Annual increase in rental payment	3.00%
Number of extensions available (in extension) \| extension	6
Lease renewal terms	5 years
Property Subject to Operating Lease \| 6th & Pine Development, LLC
Debt Instrument [Line Items]
Lease renewal terms	5 years
Number of properties \| property	2
Annual increase in rental payment	3.40%
Operating lease renewal options \| Lease_Renewal_Option	2