v3.23.1
Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
Dec. 31, 2020
Dec. 31, 2019
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity $ 10,319 $ 28,989 $ 38,624 $ 39,781 $ 33,679
Accumulated Other Comprehensive Income (Loss)          
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity (16,863) 8,233   14,653 9,329
Retained Earnings          
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity $ 18,207 $ 10,937   0 0
Cumulative effect of change in accounting principle          
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity       (1,157) $ (246)
Cumulative effect of change in accounting principle | Accumulated Other Comprehensive Income (Loss)          
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity       $ (2,349)  
ASU 2018-12 | Cumulative effect of change in accounting principle | Minimum | Accumulated Other Comprehensive Income (Loss)          
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity     2,300    
ASU 2018-12 | Cumulative effect of change in accounting principle | Minimum | Retained Earnings          
Summary of Significant Accounting Policies [Line Items]          
Stockholders' equity     $ 1,200    
Building          
Summary of Significant Accounting Policies [Line Items]          
Useful life (in years) 40 years        
Furniture and Fixtures          
Summary of Significant Accounting Policies [Line Items]          
Useful life (in years) 10 years        
Office Equipment          
Summary of Significant Accounting Policies [Line Items]          
Useful life (in years) 5 years        
Capitalized Software Costs          
Summary of Significant Accounting Policies [Line Items]          
Useful life (in years) 10 years