Number Of Counties In Which Entity Operates

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- Definition

Number of medical members served.

+ References

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
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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.

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
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- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Topic 805
-SubTopic 10
-Section 25
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Business Acquisitions Business Acquisition (Assets Liabilities Acquired) (Details) members in Thousands, medical_member in Millions, $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($) medical_member	Feb. 15, 2018 members counties	Dec. 31, 2017 USD ($)	Dec. 21, 2017 members
Business Acquisition [Line Items]
Number of medical membership members \| medical_member	39.5
Goodwill	$ 20,468		$ 19,231
America’s 1st Choice [Member]
Business Acquisition [Line Items]
Number of medical membership members \| members		135
America’s 1st Choice [Member] \| State of Florida [Member]
Business Acquisition [Line Items]
Number of counties In which entity operates \| counties		25
America’s 1st Choice [Member] \| State of South Carolina [Member]
Business Acquisition [Line Items]
Number of counties In which entity operates \| counties		3
America’s 1st Choice [Member] \| Government Business Segment [Member]
Business Acquisition [Line Items]
Goodwill	1,021
Goodwill, Purchase Accounting Adjustments	31
Other intangible assets	$ 711
America’s 1st Choice [Member] \| Government Business Segment [Member] \| Customer relationships and provider networks \| Minimum [Member]
Business Acquisition [Line Items]
Intangible assets amortization period, years	3 years
America’s 1st Choice [Member] \| Government Business Segment [Member] \| Customer relationships and provider networks \| Maximum [Member]
Business Acquisition [Line Items]
Intangible assets amortization period, years	20 years
HealthSun [Domain] \| State of Florida [Member]
Business Acquisition [Line Items]
Number of medical membership members \| members				40
HealthSun [Domain] \| Government Business Segment [Member]
Business Acquisition [Line Items]
Goodwill	$ 1,605
Goodwill, Purchase Accounting Adjustments	(38)
Other intangible assets	$ 637
HealthSun [Domain] \| Government Business Segment [Member] \| Customer Relationships [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Intangible assets amortization period, years	4 years
HealthSun [Domain] \| Government Business Segment [Member] \| Customer Relationships [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Intangible assets amortization period, years	20 years