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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Dec. 31, 2023
Jun. 30, 2024
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]                
Effective income tax rate reconciliation, estimated tax rate     (11.10%)          
Effective income tax rate     5.20% 35.90% (11.80%) (0.60%) 14.70%  
Effective income tax rate reconciliation, tax contingency, amount   $ 335            
Deferred tax assets, valuation allowance expense   155            
Valuation allowance $ 4,550       $ 4,550 $ 3,162    
Unrecognized tax benefits $ 1,131       $ 1,131 $ 915 $ 858 $ 966
Unrecognized tax benefits, decrease resulting from settlements with taxing authorities   $ 625            
Minimum                
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]                
Deferred tax liability, valuation allowance measurement duration 5 years              
Deferred tax asset, valuation allowance measurement duration 15 years              
Maximum                
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]                
Deferred tax liability, valuation allowance measurement duration 10 years              
Deferred tax asset, valuation allowance measurement duration 20 years