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Distribution Across Property Type and Geographic Region for Commercial Mortgage Loans (Detail) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 6,692 | $ 6,829
% of total | 100.00% | 100.00%
Allowance for credit losses | $ (30) | $ (27)
Commercial mortgage loans, net | 6,662 | 6,802
Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 6,692 | $ 6,829
% of total | 100.00% | 100.00%
Allowance for credit losses | $ (30) | $ (27)
Commercial mortgage loans, net | 6,662 | 6,802
South Atlantic | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 1,808 | $ 1,803
% of total | 27.00% | 26.00%
Pacific | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 1,228 | $ 1,281
% of total | 18.00% | 19.00%
Mountain | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 1,002 | $ 1,029
% of total | 15.00% | 15.00%
Middle Atlantic | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 889 | $ 925
% of total | 13.00% | 14.00%
West South Central | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 545 | $ 553
% of total | 8.00% | 8.00%
East North Central | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 442 | $ 445
% of total | 7.00% | 6.00%
West North Central | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 396 | $ 404
% of total | 6.00% | 6.00%
East South Central | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 202 | $ 206
% of total | 3.00% | 3.00%
New England | Commercial Mortgage Loan |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 180 | $ 183
% of total | 3.00% | 3.00%
Retail |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 2,794 | $ 2,858
% of total | 42.00% | 42.00%
Office |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 1,457 | $ 1,481
% of total | 22.00% | 22.00%
Industrial |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 1,400 | $ 1,440
% of total | 21.00% | 21.00%
Apartments |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 513 | $ 522
% of total | 8.00% | 8.00%
Mixed Use |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 372 | $ 371
% of total | 5.00% | 5.00%
Other |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |
Commercial mortgage loans, amortized cost | $ 156 | $ 157
% of total | 2.00% | 2.00%

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