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Capital Structure - Schedule of Total Debt Outstanding (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Due in one year through five years $ 1,650 $ 2,250
Due after five years through ten years 1,778 1,778
Due after ten years 4,113 4,113
Total long-term debt principal 7,541 8,141
Debt issuance costs (51) (56)
Total debt $ 7,490 8,085
Redemption price as percentage of principal amount plus accrued and unpaid interest (as a percent) 100.00%  
0.750% Senior Notes, due 2025    
Debt Instrument [Line Items]    
Due in one year through five years $ 0 600
Note stated interest rate (as a percent) 0.75%  
3.280% Senior Notes, due 2026    
Debt Instrument [Line Items]    
Due in one year through five years $ 550 550
Note stated interest rate (as a percent) 3.28%  
5.050% Senior Notes, due 2029    
Debt Instrument [Line Items]    
Due in one year through five years $ 500 500
Note stated interest rate (as a percent) 5.05%  
1.450% Senior Notes, due 2030    
Debt Instrument [Line Items]    
Due in one year through five years $ 600 600
Note stated interest rate (as a percent) 1.45%  
6.125% Senior Notes, due 2032    
Debt Instrument [Line Items]    
Due after five years through ten years $ 159 159
Note stated interest rate (as a percent) 6.125%  
5.250% Senior Notes due 2033    
Debt Instrument [Line Items]    
Due after five years through ten years $ 750 750
Note stated interest rate (as a percent) 5.25%  
5.350% Senior Notes due 2033    
Debt Instrument [Line Items]    
Due after five years through ten years $ 323 323
Note stated interest rate (as a percent) 5.35%  
5.550% Senior Notes due 2035    
Debt Instrument [Line Items]    
Due after five years through ten years $ 546 546
Note stated interest rate (as a percent) 5.55%  
5.950% Senior Notes, due 2036    
Debt Instrument [Line Items]    
Due after ten years $ 386 386
Note stated interest rate (as a percent) 5.95%  
6.900% Senior Debentures, due 2038    
Debt Instrument [Line Items]    
Due after ten years $ 165 165
Note stated interest rate (as a percent) 6.90%  
5.200% Senior Notes due 2042    
Debt Instrument [Line Items]    
Due after ten years $ 62 62
Note stated interest rate (as a percent) 5.20%  
4.500% Senior Notes, due 2043    
Debt Instrument [Line Items]    
Due after ten years $ 500 500
Note stated interest rate (as a percent) 4.50%  
4.200% Senior Notes, due 2046    
Debt Instrument [Line Items]    
Due after ten years $ 700 700
Note stated interest rate (as a percent) 4.20%  
3.850% Senior Notes, due 2049    
Debt Instrument [Line Items]    
Due after ten years $ 500 500
Note stated interest rate (as a percent) 3.85%  
Floating Rate Subordinated Debentures, due 2053    
Debt Instrument [Line Items]    
Due after ten years $ 500 500
Floating Rate Subordinated Debentures, due 2053    
Debt Instrument [Line Items]    
Due after ten years 800 800
6.500% Junior Subordinated Debentures, due 2067    
Debt Instrument [Line Items]    
Due after ten years $ 500 $ 500
Note stated interest rate (as a percent) 6.50%