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Debt - Credit Facilities and Restrictive Covenants (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Line of Credit Facility [Line Items]    
Current portion of debt $ 2,009 $ 4,049
$3.5 billion credit facility due August 20, 2027    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity 3,500  
Borrowing Capacity, Optional Increase $ 1,000  
Maximum ratio of consolidated total funded debt to consolidated earnings before interest income taxes DDA 5.50  
Current portion of debt $ 0 0
Letters of credit outstanding 57  
Remaining borrowing capacity $ 3,100  
$3.5 billion credit facility due August 20, 2027 | Minimum    
Line of Credit Facility [Line Items]    
Standby fee rate 0.10%  
$3.5 billion credit facility due August 20, 2027 | Maximum    
Line of Credit Facility [Line Items]    
Standby fee rate 0.25%  
$3.5 billion credit facility due August 20, 2027 | Secured Overnight Financing Rate (SOFR) | Minimum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.00%  
$3.5 billion credit facility due August 20, 2027 | Secured Overnight Financing Rate (SOFR) | Maximum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.75%  
$3.5 billion credit facility due August 20, 2027 | Federal Funds Rate    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.50%  
$3.5 billion credit facility due August 20, 2027 | Eurodollar    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.00%  
$3.5 billion credit facility due August 20, 2027 | SOFR Alternative Base Rate | Minimum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.10%  
$3.5 billion credit facility due August 20, 2027 | SOFR Alternative Base Rate | Maximum    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.75%  
Commercial paper notes    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 3,500  
Debt term 270 days  
Current portion of debt $ 331 $ 1,989