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Financing Receivables (Credit Quality Information Tables) (Details) - USD ($) $ in Millions | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 3,230 | $ 3,263 |  |
Less: allowance for loan losses | 23 | 24 | $ 24 | $ 26
Commercial mortgage loans [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | 2,681 | 2,715 |  |
Less: allowance for loan losses | 19 | 19 |  |
Total loans, net | $ 2,662 | $ 2,696 |  |
Percentage of gross commercial mortgage loans | 100.00% | 100.00% |  |
Commercial mortgage loans [Member] | Apartment Building [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 611 | $ 621 |  |
Percentage of gross commercial mortgage loans | 23.00% | 23.00% |  |
Commercial mortgage loans [Member] | Hotel [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 53 | $ 43 |  |
Percentage of gross commercial mortgage loans | 2.00% | 1.00% |  |
Commercial mortgage loans [Member] | Industrial [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 432 | $ 453 |  |
Percentage of gross commercial mortgage loans | 16.00% | 17.00% |  |
Commercial mortgage loans [Member] | Mixed use [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 68 | $ 54 |  |
Percentage of gross commercial mortgage loans | 3.00% | 2.00% |  |
Commercial mortgage loans [Member] | Office [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 420 | $ 435 |  |
Percentage of gross commercial mortgage loans | 15.00% | 16.00% |  |
Commercial mortgage loans [Member] | Retail [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 901 | $ 897 |  |
Percentage of gross commercial mortgage loans | 34.00% | 33.00% |  |
Commercial mortgage loans [Member] | Other [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 196 | $ 212 |  |
Percentage of gross commercial mortgage loans | 7.00% | 8.00% |  |
Commercial mortgage loans [Member] | East North Central [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 216 | $ 216 |  |
Percentage of gross commercial mortgage loans | 8.00% | 8.00% |  |
Commercial mortgage loans [Member] | East South Central [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 107 | $ 107 |  |
Percentage of gross commercial mortgage loans | 4.00% | 4.00% |  |
Commercial mortgage loans [Member] | Middle Atlantic [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 186 | $ 187 |  |
Percentage of gross commercial mortgage loans | 7.00% | 7.00% |  |
Commercial mortgage loans [Member] | Mountain [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 249 | $ 237 |  |
Percentage of gross commercial mortgage loans | 9.00% | 9.00% |  |
Commercial mortgage loans [Member] | New England [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 56 | $ 62 |  |
Percentage of gross commercial mortgage loans | 2.00% | 2.00% |  |
Commercial mortgage loans [Member] | Pacific [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 813 | $ 814 |  |
Percentage of gross commercial mortgage loans | 30.00% | 30.00% |  |
Commercial mortgage loans [Member] | South Atlantic [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 705 | $ 731 |  |
Percentage of gross commercial mortgage loans | 26.00% | 27.00% |  |
Commercial mortgage loans [Member] | West North Central [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 205 | $ 213 |  |
Percentage of gross commercial mortgage loans | 8.00% | 8.00% |  |
Commercial mortgage loans [Member] | West South Central [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 144 | $ 148 |  |
Percentage of gross commercial mortgage loans | 6.00% | 5.00% |  |
Syndicated loans [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Financing Receivable, Gross | $ 549 | $ 548 |  |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Nonperforming loans | 13 | 16 |  |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Syndicated loans [Member] |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |
Nonperforming loans | $ 0 | $ 0 |  |

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Recorded Investment in financing receivables that are past due at the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953401-111524 + Details
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- Definition Amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date. Such amount may include accrued interest receivable in accordance with the terms of the note. The note also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. Excludes amounts related to receivables held-for-sale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(3)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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