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Regulatory Requirements (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2021 USD ($)
Regulatory Assets [Line Items] |
Minimum period required for financial resources to cover operating costs | 1 year
Minimum period required for cash or highly liquid securities to cover operating costs | 6 months
Net assets held by regulated subsidiaries | $ 687.9
Amount of capital in excess of aggregate regulatory requirements | 375.4
Disposal Group, Held-for-sale, Not Discontinued Operations |
Regulatory Assets [Line Items] |
Net assets held by regulated subsidiaries | 51.9
Amount of capital in excess of aggregate regulatory requirements | $ 43.2

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- Definition Regulatory requirement minimum period of cash or highly liquid securities to cover operating costs. + References No definition available. + Details
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- Definition Regulatory requirement minimum period of financial resources to cover operating costs. + References No definition available. + Details
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- Definition Amount of total risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826 + Details
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- Definition The net amount of all regulatory assets less all regulatory liabilities as of the end of the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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- 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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- Details
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