v3.26.3
Goodwill and Other Intangible Assets, net: (Narrative) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Goodwill [Line Items]          
Impairment of goodwill $ 0 $ 41 $ 0 $ 41  
Impairment of non-amortizable intangible assets 0   0    
Goodwill 16,789   16,789   $ 17,264
Estimated amortization expense, year one, assuming no additional transactions occur that require the amortization of intangible assets 1,003   1,003    
Estimated amortization expense, year two, assuming no additional transactions occur that require the amortization of intangible assets 1,003   1,003    
Estimated amortization expense, year three, assuming no additional transactions occur that require the amortization of intangible assets 1,003   1,003    
Estimated amortization expense, year four, assuming no additional transactions occur that require the amortization of intangible assets 1,003   1,003    
Estimated amortization expense, year five, assuming no additional transactions occur that require the amortization of intangible assets 1,003   1,003    
Wellness Reporting Unit          
Goodwill [Line Items]          
Goodwill $ 337   $ 337