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Debt - Bridge Credit Agreement (Details) - Subsequent Event - Bridge Credit Agreement | Jan. 31, 2018 USD ($)
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Debt Instrument [Line Items] |
Face amount of debt | $ 550,000,000
Proceeds used for working capital and acquisition financings | 300,000,000
Future reduction to face amount | $ 150,000,000

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- Definition Debt Instrument, Future Reduction to Face Amount + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Debt Instrument, Proceeds Used for Working Capital and Acquisition Financings + References No definition available. + Details
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Namespace Prefix: | moh_
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Balance Type: | credit
Period Type: | instant

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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Period Type: | instant

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- Details
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- Details
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Balance Type: |
Period Type: |