INVESTMENTS - Gross Unrealized Losses On Fixed Maturity Securities (Details) $ in Millions	Dec. 31, 2021 USD ($)
Fair Value
Less Than Twelve Months	$ 3,516
Twelve Months or More	285
Total	3,801
Gross   Unrealized  Losses
Less Than Twelve Months	76
Twelve Months or More	10
Total	86
U.S Treasury securities and obligations of U.S. government authorities and agencies
Fair Value
Less Than Twelve Months	74
Twelve Months or More	0
Total	74
Gross   Unrealized  Losses
Less Than Twelve Months	1
Twelve Months or More	0
Total	1
Obligations of U.S. states and their political subdivisions
Fair Value
Less Than Twelve Months	5
Twelve Months or More	0
Total	5
Gross   Unrealized  Losses
Less Than Twelve Months	0
Twelve Months or More	0
Total	0
Foreign government bonds
Fair Value
Less Than Twelve Months	13
Twelve Months or More	7
Total	20
Gross   Unrealized  Losses
Less Than Twelve Months	1
Twelve Months or More	0
Total	1
U.S. corporate public securities
Fair Value
Less Than Twelve Months	696
Twelve Months or More	153
Total	849
Gross   Unrealized  Losses
Less Than Twelve Months	12
Twelve Months or More	6
Total	18
U.S. corporate private securities
Fair Value
Less Than Twelve Months	855
Twelve Months or More	0
Total	855
Gross   Unrealized  Losses
Less Than Twelve Months	14
Twelve Months or More	0
Total	14
Foreign corporate public securities
Fair Value
Less Than Twelve Months	522
Twelve Months or More	50
Total	572
Gross   Unrealized  Losses
Less Than Twelve Months	8
Twelve Months or More	1
Total	9
Foreign corporate private securities
Fair Value
Less Than Twelve Months	689
Twelve Months or More	0
Total	689
Gross   Unrealized  Losses
Less Than Twelve Months	34
Twelve Months or More	0
Total	34
Asset-backed securities
Fair Value
Less Than Twelve Months	499
Twelve Months or More	0
Total	499
Gross   Unrealized  Losses
Less Than Twelve Months	1
Twelve Months or More	0
Total	1
Commercial mortgage-backed securities
Fair Value
Less Than Twelve Months	157
Twelve Months or More	75
Total	232
Gross   Unrealized  Losses
Less Than Twelve Months	5
Twelve Months or More	3
Total	8
Residential mortgage-backed securities
Fair Value
Less Than Twelve Months	6
Twelve Months or More	0
Total	6
Gross   Unrealized  Losses
Less Than Twelve Months	0
Twelve Months or More	0
Total	0
Fixed Maturities
Gross   Unrealized  Losses
Twelve Months or More	$ 10