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Acquisitions and Divestitures - Identifiable Intangible Assets (Details) - Magellan Health $ in Millions	Jan. 04, 2022 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Intangibles assets	$ 889
Acquired finite-lived intangible assets, weighted average useful life	12 years
Purchased contract rights
Acquired Finite-Lived Intangible Assets [Line Items]
Intangibles assets	$ 581
Acquired finite-lived intangible assets, weighted average useful life	13 years
Provider contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Intangibles assets	$ 120
Acquired finite-lived intangible assets, weighted average useful life	15 years
Developed technologies
Acquired Finite-Lived Intangible Assets [Line Items]
Intangibles assets	$ 101
Acquired finite-lived intangible assets, weighted average useful life	5 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Intangibles assets	$ 87
Acquired finite-lived intangible assets, weighted average useful life	17 years

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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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-Topic 350
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The amount of identifiable intangible assets recognized as of the acquisition date.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
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