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Income Tax (Narrative) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Operating Loss Carryforwards [Line Items]        
Proceeds from Income Tax Refunds $ 13 $ 3 $ 20  
Cash paid for income taxes 311 131 388  
Decrease in Unrecognized Tax Benefits is Reasonably Possible 3      
Deferred Tax Assets, Tax Credit Carryforwards, Foreign 108      
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 3 3    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense   (31)    
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 303 25    
Cash paid for income taxes 311 131 388  
Deferred Tax Assets, Valuation Allowance 567 235    
Proceeds from Income Tax Refunds 13 3 20  
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability 1,700 1,500    
Operating Loss Carryforwards 1,066      
Unrecognized Tax Benefits 33 36 $ 34 $ 342
Unrecognized Tax Benefits, Interest on Income Taxes Accrued 3 $ 3    
Foreign Tax Authority | Revenue Commissioners, Ireland        
Operating Loss Carryforwards [Line Items]        
Deferred Tax Assets, Tax Credit Carryforwards, Foreign $ 23