Investment Securities - Contractual Maturities of AFS Investment Securities (Details) $ in Millions	Jun. 30, 2022 USD ($)
Fixed maturities, excluding mortgage-backed, asset-backed, and collateralized securities:
Due in 1 year or less	$ 193
Due after 1 year through 5 years	496
Due after 5 years through 10 years	561
Due after 10 years	149
Mortgage-backed, asset-backed, and collateralized securities	301
Total	1,700
Fixed maturities, excluding mortgage-backed, asset-backed, and collateralized securities:
Due in 1 year or less	193
Due after 1 year through 5 years	513
Due after 5 years through 10 years	624
Due after 10 years	171
Mortgage-backed, asset-backed, and collateralized securities	323
Cost/ Amortized Cost	$ 1,824

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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