v3.25.0.1
Significant Accounting Policies - Narrative (Details)
store in Thousands, shares in Millions, people in Millions, patient in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
state
people
segment
clinic
store
patient
shares
Dec. 31, 2023
USD ($)
business
shares
Dec. 31, 2022
USD ($)
shares
Dec. 31, 2021
Dec. 31, 2014
Significant Accounting Policies [Line Items]            
Number of pharmacy plan members | people   90        
Number of patients served per year (more than) | patient   0.8        
Number of reportable segments | segment   4        
Number of businesses acquired | business     2      
Allowance for credit losses   $ 407 $ 343      
Depreciation   2,600 2,500 $ 2,400    
Asset impairment charges     152      
Office real estate optimization charges   30 46 117    
Goodwill impairment   0 0 0    
Impairment of intangible assets, indefinite-lived   0 0 0    
Premium deficiency reserve   0 0      
Self insurance liabilities   $ 1,100 1,100      
Pharmacy rebate period   30 days        
Advertising costs   $ 989 $ 985 $ 745    
Treasury shares held in trust (in shares) | shares   1 1 1    
Charitable contribution to CVS Health Foundation   $ 0 $ 0 $ 25    
Variable Interest Entity, Primary Beneficiary, Red Oak Sourcing, LLC            
Significant Accounting Policies [Line Items]            
VIE, ownership percentage           50.00%
Initial contractual term (in years)           10 years
Amended contract extension term         5 years  
Amended contract term (in years)         15 years  
Proceeds from VIE   126 183 $ 183    
Medicare Product Line            
Significant Accounting Policies [Line Items]            
Total premium deficiency reserve $ 766          
Premium deficiency reserve, write-off of unamortized acquisition costs 383          
Premium deficiency reserve, charge to health care costs 383          
Premium deficiency reserve   0        
Individual Exchange Product Line            
Significant Accounting Policies [Line Items]            
Total premium deficiency reserve 270          
Premium deficiency reserve, write-off of unamortized acquisition costs 11          
Premium deficiency reserve, charge to health care costs 259          
Premium deficiency reserve   0        
Other Insurance Liabilities            
Significant Accounting Policies [Line Items]            
Liability for unpaid claims   280 285      
Liability for future policy benefits   371 393      
Other Long-Term Insurance Liabilities            
Significant Accounting Policies [Line Items]            
Liability for unpaid claims   713 834      
Liability for future policy benefits   4,200 $ 4,600      
Government Reporting Unit            
Significant Accounting Policies [Line Items]            
Goodwill impairment 0          
Retail Stores            
Significant Accounting Policies [Line Items]            
Asset impairment charges 607 607        
Impairment of operating and financing lease right-of-use assets 483 483        
Impairment of property and equipment $ 124 124        
Non-Core Assets            
Significant Accounting Policies [Line Items]            
Asset impairment charges   $ 269        
Minimum            
Significant Accounting Policies [Line Items]            
Period after date of service a claim is paid   6 months        
Award vesting period   3 years        
Minimum | Buildings, building improvements and leasehold improvements            
Significant Accounting Policies [Line Items]            
Useful life of property plant and equipment   1 year        
Minimum | Fixtures, equipment and internally developed software            
Significant Accounting Policies [Line Items]            
Useful life of property plant and equipment   3 years        
Maximum            
Significant Accounting Policies [Line Items]            
Lease renewal term   5 years        
Period after date of service a claim is paid   48 months        
Award vesting period   5 years        
Maximum | Buildings, building improvements and leasehold improvements            
Significant Accounting Policies [Line Items]            
Useful life of property plant and equipment   40 years        
Maximum | Fixtures, equipment and internally developed software            
Significant Accounting Policies [Line Items]            
Useful life of property plant and equipment   10 years        
Pharmacy & Consumer Wellness            
Significant Accounting Policies [Line Items]            
Number of retail locations (more than) | store   9        
Health Services            
Significant Accounting Policies [Line Items]            
Number of walk-in medical clinics (more than) | clinic   1,000        
Health Care Benefits            
Significant Accounting Policies [Line Items]            
Number of people served (more than) | people   36        
Number of states in which the Company has entered the individual public health insurance exchange | state   17