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Long-term Debt (Senior Unsecured Credit Facility) (Details) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Long-term debt    
Letters of credit outstanding $ 400,000  
Line of credit facility, available borrowing capacity $ 1,758,000,000  
Debt, Weighted Average Interest Rate 5.02%  
Line of Credit [Member] | Secured Overnight Financing Rate (SOFR)    
Long-term debt    
Basis spread on variable rate debt 1.05%  
Line of Credit [Member] | Base Rate    
Long-term debt    
Basis spread on variable rate debt 0.05%  
Line of Credit [Member] | Minimum | Secured Overnight Financing Rate (SOFR)    
Long-term debt    
Basis spread on variable rate debt 0.725%  
Line of Credit [Member] | Minimum | Base Rate    
Long-term debt    
Basis spread on variable rate debt 0.00%  
Line of Credit [Member] | Maximum | Secured Overnight Financing Rate (SOFR)    
Long-term debt    
Basis spread on variable rate debt 1.40%  
Line of Credit [Member] | Maximum | Base Rate    
Long-term debt    
Basis spread on variable rate debt 0.40%  
Unsecured $2,090 million revolver due December 2028    
Long-term debt    
Revolving credit facility, commitment fee percentage 0.25%  
Unsecured $2,090 million revolver due December 2028 | Secured Overnight Financing Rate (SOFR)    
Long-term debt    
Basis spread on variable rate debt 1.30%  
Unsecured $2,090 million revolver due December 2028 | Base Rate    
Long-term debt    
Basis spread on variable rate debt 0.30%  
Unsecured $2,090 million revolver due December 2028 | Minimum    
Long-term debt    
Revolving credit facility, commitment fee percentage 0.125%  
Unsecured $2,090 million revolver due December 2028 | Minimum | Secured Overnight Financing Rate (SOFR)    
Long-term debt    
Basis spread on variable rate debt 0.85%  
Unsecured $2,090 million revolver due December 2028 | Minimum | Base Rate    
Long-term debt    
Basis spread on variable rate debt 0.00%  
Unsecured $2,090 million revolver due December 2028 | Maximum    
Long-term debt    
Revolving credit facility, commitment fee percentage 0.30%  
Unsecured $2,090 million revolver due December 2028 | Maximum | Secured Overnight Financing Rate (SOFR)    
Long-term debt    
Basis spread on variable rate debt 170.00%  
Unsecured $2,090 million revolver due December 2028 | Maximum | Base Rate    
Long-term debt    
Basis spread on variable rate debt 0.70%  
Senior Unsecured Notes 4.00 Percent Due 2031    
Long-term debt    
Debt Instrument, Face Amount $ 700,000,000  
Debt Instrument, Interest Rate, Stated Percentage 4.00%  
Long-term Debt, Gross $ 700,000,000 $ 700,000,000
$700 million 4.00% senior unsecured notes due January 2030    
Long-term debt    
Debt Instrument, Face Amount $ 700,000,000  
Debt Instrument, Interest Rate, Stated Percentage 4.00%  
Long-term Debt, Gross $ 700,000,000 $ 700,000,000
Unsecured $2,090 million revolver due December 2028    
Long-term debt    
Line of credit facility, maximum borrowing capacity 331,600,000  
Initial Revolving Credit Facility    
Long-term debt    
Line of credit facility, maximum borrowing capacity $ 2,090,000,000.00