v3.23.1
Fair Value Measurements - Assets measured at fair value on a non-recurring basis and related impairment charges (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments [1] $ 10,418 $ 10,567  
Impairment Charges 25 32 $ 80
Non-Recurring Basis      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 12 89  
Mortgage and other loans receivable   15  
Other assets 0 14  
Total 12 118  
Impairment Charges 25 7 82
Non-Recurring Basis | Other investments      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment Charges 25 6 77
Non-Recurring Basis | Other Invested Assets      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impairment Charges 0 1 $ 5
Non-Recurring Basis | Asset Class to Loans Held For Sale      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total 163    
Non-Recurring Basis | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 0 0  
Mortgage and other loans receivable   0  
Other assets 0 0  
Total 0 0  
Non-Recurring Basis | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 0 0  
Mortgage and other loans receivable   0  
Other assets 0 14  
Total 0 14  
Non-Recurring Basis | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other investments 12 89  
Mortgage and other loans receivable   15  
Other assets 0 0  
Total $ 12 $ 104  
[1] See Note 9 for details of balances associated with variable interest entities