XML 67 R54.htm IDEA: XBRL DOCUMENT v3.22.4
Investments (Securities in a gross unrealized loss position by ratings) (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value $ 29,511 $ 6,065
Gross Unrealized Losses 4,056 112
U.S. Government, Government agencies and Government-sponsored enterprises    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 2,355 898
Gross Unrealized Losses 337 8
AAA    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 1,559 368
Gross Unrealized Losses 298 6
AA    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 4,327 875
Gross Unrealized Losses 817 17
A    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 6,615 1,516
Gross Unrealized Losses 749 23
BBB    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 13,226 1,812
Gross Unrealized Losses 1,621 42
Non-investment grade    
Debt Securities, Available-for-sale [Line Items]    
Estimated Fair Value 1,429 596
Gross Unrealized Losses $ 234 $ 16