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Investments (Distribution By Contractual Maturity Of Available-For-Sale and Held-To-Maturity Investments) (Detail) - Fixed Maturities [Member] $ in Millions | Jun. 30, 2019 USD ($)
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Available For Sale Securities [Abstract] |
Due in one year or less | $ 726
Due after one year through five years | 705
Due after five years through ten years | 448
Due after ten years | 744
Mortgage-Backed and Asset-Backed | 703
Total Available-For-Sale, amortized cost | 3,326
Due in one year or less | 749
Due after one year through five years | 764
Due after five years through ten years | 431
Due after ten years | 815
Mortgage-Backed and Asset-Backed | 700
Total Available-For-Sale, fair value | 3,459
Variable Interest Entity Primary Beneficiary [Member] |
Held To Maturity Securities [Abstract] |
Due in one year or less | 0
Due after one year through five years | 0
Due after five years through ten years | 0
Due after ten years | 890
Mortgage-Backed and Asset-Backed | 0
Total held-to-maturity, amortized cost | 890
Due in one year or less | 0
Due after one year through five years | 0
Due after five years through ten years | 0
Due after ten years | 967
Mortgage-Backed and Asset-Backed | 0
Held-To-Maturity Securities Fair Value | $ 967

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