v3.25.4
Debt (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Aug. 18, 2025
Dec. 31, 2024
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities $ 7,158   $ 7,160
Current maturities of long-term debt 0   381
Debt, Long-term and Short-term, Combined Amount 7,158   7,541
Unamortized debt issuance costs and discounts (64)   (62)
Short-term borrowings $ 0   0
Debt instrument call feature description We may redeem all of our senior notes from time to time or all of the notes of each series at any time at the applicable redemption prices, plus accrued and unpaid interest.    
Long-term debt $ 7,158   7,160
Long-term debt - maturity 2026 0    
Long-term debt - maturity 2027 90    
Long-term debt - maturity 2028 0    
Long-term debt - maturity 2029 0    
Long-term debt - maturity 2030 1,000    
Senior notes due February 2027      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities $ 90   90
Interest rate (in hundredths) 6.75%    
Senior notes due March 2030      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities $ 1,000   1,000
Senior notes due November 2035      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 997   997
Debt instrument, repurchase amount 0   3
Senior notes due September 2038      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 763   763
Senior notes due September 2039      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 938   938
Debt instrument, repurchase amount 0   8
Senior notes due November 2041      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 469   469
Debt instrument, repurchase amount 0   31
Senior notes due August 2043      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 846   846
Debt instrument, repurchase amount 0   32
Senior notes due November 2045      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 1,887   1,887
Debt instrument, repurchase amount 0   24
Senior notes due August 2096      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities $ 226   226
Interest rate (in hundredths) 7.60%    
Debt instruments without call feature description may not be redeemed prior to maturity    
Debt instrument, repurchase amount $ 0   2
Other Debt Obligations      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities 6   6
Senior & medium term notes with various maturity dates      
Debt Instrument [Line Items]      
Debt instrument, repurchase amount $ 0   $ 100
Senior notes due November 2025      
Debt Instrument [Line Items]      
Interest rate (in hundredths) 3.80%    
Repayments of senior debt $ 382    
Line of credit expires in August 2030      
Debt Instrument [Line Items]      
Long-term Line of Credit   $ 3,500  
Outstanding balance of Senior Notes due Various Dates      
Debt Instrument [Line Items]      
Long-term Debt, Excluding Current Maturities $ 5,400