Quarterly report pursuant to Section 13 or 15(d)

Acquisitions - Schedule of Fair Value of Assets Acquired and Liabilities Assumed (Details)

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Acquisitions - Schedule of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
Jan. 23, 2020
Jun. 30, 2020
Dec. 31, 2019
Assets acquired and liabilities assumed      
Goodwill   $ 17,434 $ 6,863
WellCare Health Plans, Inc.      
Assets acquired and liabilities assumed      
Cash and cash equivalents $ 2,947    
Premium and related receivables 3,437    
Short-term investments 355    
Other current assets 1,116    
Long-term investments 2,716    
Restricted deposits 320    
Property, software and equipment 259    
Intangible assets 7,000    
Other long-term assets 313    
Total assets acquired 18,463    
Medical claims liability 4,073    
Accounts payable and accrued expenses 3,100    
Return of premium payable 238    
Unearned revenue 183    
Long-term debt 2,055    
Deferred tax liabilities 1,534    
Other long-term liabilities 312    
Total liabilities assumed 11,495    
Total identifiable net assets 6,968    
Goodwill 10,637    
Total assets acquired and liabilities assumed $ 17,605    
Acquired intangibles, weighted average useful life years 13 years    
Debt assumed, aggregate principle $ 1,950    
Debt assumed, excess of principle 105    
Deferred tax assets 348    
WellCare Health Plans, Inc. | Purchased contract rights      
Assets acquired and liabilities assumed      
Intangible assets 5,200    
WellCare Health Plans, Inc. | Trade names      
Assets acquired and liabilities assumed      
Intangible assets 800    
WellCare Health Plans, Inc. | Provider contracts      
Assets acquired and liabilities assumed      
Intangible assets 700    
WellCare Health Plans, Inc. | Developed technologies      
Assets acquired and liabilities assumed      
Intangible assets $ 300