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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Loss Contingencies [Line Items]      
Operating Lease, Cost $ 1,400 $ 1,400 $ 1,300
Operating Lease, Payments $ 1,100 $ 1,100 $ 1,000
Operating Lease, Weighted Average Remaining Lease Term 9 years 6 months    
Operating Lease, Weighted Average Discount Rate, Percent 4.70%    
Other Commitment $ 4,000    
Other Commitments, Description As of December 31, 2024, the Company has entered into agreements to acquire companies in the health care sector, subject to regulatory approval and other customary closing conditions. The total anticipated capital required for these acquisitions, excluding the payoff of acquired indebtedness, is approximately $4 billion.