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Leases (Summary of Operating And Finance Lease Costs) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Leases [Abstract]      
Operating Lease ROU Assets, in Other Assets $ 1,187 $ 788  
Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List Other Assets Other Assets  
Finance Lease ROU Assets, in Other Property Plant and Equipment $ 0 $ 12  
Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List Property, Plant and Equipment, Cost Property, Plant and Equipment, Cost  
Operating Lease Liabilities, Current $ 117 $ 82  
Operating Lease Liabilities, Long-term 1,105 737  
Finance Lease Liabilities, Current, in accounts payable and accrued liabilities $ 0 $ 8  
Finance Lease, Liability, Current, Statement Of Financial Position [Extensible List] Accounts payable and accrued liabilities Accounts payable and accrued liabilities  
Finance Lease Liabilities, Long-term, in other liabilities and provisions $ 0 $ 12  
Finance Lease, Liability, Noncurrent, Statement Of Financial Position [Extensible List] Other Liabilities and Provisions Other Liabilities and Provisions  
Weighted Average Discount Rate      
Operating leases 5.40% 5.42%  
Finance leases 0.00% 6.11%  
Weighted Average Remaining Lease Term      
Operating leases 12 years 2 months 12 days 12 years 1 month 6 days  
Finance leases 2 years 6 months  
Lease Costs:      
Operating Lease Costs, Excluding Short-Term Leases $ 264 $ 271  
Finance Lease Costs:      
Amortization of ROU assets 3 5  
Interest on lease liabilities 1 1 $ 2
Total Finance Lease Costs 4 6  
Short-Term Lease Costs 251 259  
Variable Lease Costs 62 117  
Sublease Income:      
Operating lease income 53 53  
Variable lease income 20 21  
Cash Paid for Amounts Included in the Measurement of Lease Liabilities:      
Operating cash outflows from operating leases 244 198  
Investing cash outflows from operating leases 267 326  
Operating cash outflows from finance leases 1 1  
Financing cash outflows from finance leases 4 7  
Supplemental Non-Cash Information:      
New ROU operating lease assets and liabilities $ 454 $ 46