v3.8.0.1

Investments (Commercial Mortgage and Other Loans) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 55,287 | $ 51,985
Other loans |  | 864 | 900
Total commercial mortgage and other loans | [1] | $ 56,045 | $ 52,779
% of Total |  | 100.00% | 100.00%
Net carrying value of commercial loans held for sale |  | $ 593 | $ 519
Commercial Mortgage Loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 52,084 | $ 49,027
% of Total |  | 94.20% | 94.30%
Commercial mortgage and agricultural property loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Valuation allowance, Commercial mortgage and agricultural property loans |  | $ (100) | $ (98)
Total net loans |  | 55,187 | 51,887
Uncollateralized loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Other loans |  | 663 | 638
Residential property loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Other loans |  | 196 | 252
Other collateralized loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Other loans |  | 5 | 10
Other loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total net loans |  | 858 | 892
Valuation allowance, Other loans |  | (6) | (8)
Office |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 12,670 | $ 12,424
% of Total |  | 22.90% | 23.90%
Retail |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 8,543 | $ 8,555
% of Total |  | 15.50% | 16.50%
Apartment/Multi-Family |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 15,465 | $ 13,733
% of Total |  | 28.00% | 26.40%
Industrial |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 9,451 | $ 8,075
% of Total |  | 17.10% | 15.50%
Hospitality |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 2,067 | $ 2,274
% of Total |  | 3.70% | 4.40%
Other |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 3,888 | $ 3,966
% of Total |  | 7.00% | 7.60%
Agricultural property loans |  |  |
Commercial Mortgage and Other Loans [Line Items] |  |  |
Total commercial mortgage and agricultural property loans by property type |  | $ 3,203 | $ 2,958
% of Total |  | 5.80% | 5.70%
[1] | See Note 5 for details of balances associated with variable interest entities.

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- Definition The reserve to cover probable credit losses related to specifically identified fixed maturity real estate loans as well as probable credit losses inherent in the remainder of that loan portfolio. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 310 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82921503&loc=d3e21338-158488 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition Amount before allowance of consumer real estate loans. Includes, but not limited to, construction financing, residential mortgage loans, and home equity lines of credit. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)(2),(3),(b)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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- Definition Amount before allowance of mortgage loans on existing land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5066-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(a)(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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