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Goodwill & Other Intangible Assets - Other Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Amortized Intangible Assets: |  |
Gross Carrying Amount | $ 708 | $ 79
Accumulated Amortization | (63) | (49)
Net Carrying Amount | 645 | 30
Total Indefinite Life Intangible Assets | 14 | 14
Total Other Intangible Assets | 722 | 93
Total Other Intangible Assets | $ 659 | 44
Weighted Average |  |
Amortized Intangible Assets: |  |
Weighted Average Expected Life | 15 years |
Value of in-force contracts |  |
Amortized Intangible Assets: |  |
Gross Carrying Amount | $ 23 | 0
Accumulated Amortization | (3) | 0
Net Carrying Amount | $ 20 | 0
Value of in-force contracts | Weighted Average |  |
Amortized Intangible Assets: |  |
Weighted Average Expected Life | 1 year |
Customer relationships |  |
Amortized Intangible Assets: |  |
Gross Carrying Amount | $ 590 | 0
Accumulated Amortization | (6) | 0
Net Carrying Amount | $ 584 | 0
Customer relationships | Weighted Average |  |
Amortized Intangible Assets: |  |
Weighted Average Expected Life | 15 years |
Marketing agreement with Aetna |  |
Amortized Intangible Assets: |  |
Gross Carrying Amount | $ 16 | 0
Accumulated Amortization | 0 | 0
Net Carrying Amount | $ 16 | 0
Marketing agreement with Aetna | Weighted Average |  |
Amortized Intangible Assets: |  |
Weighted Average Expected Life | 15 years |
Distribution Agreement |  |
Amortized Intangible Assets: |  |
Gross Carrying Amount | $ 70 | 70
Accumulated Amortization | (52) | (48)
Net Carrying Amount | $ 18 | 22
Distribution Agreement | Weighted Average |  |
Amortized Intangible Assets: |  |
Weighted Average Expected Life | 15 years |
Agency relationships & Other |  |
Amortized Intangible Assets: |  |
Gross Carrying Amount | $ 9 | 9
Accumulated Amortization | (2) | (1)
Net Carrying Amount | $ 7 | $ 8
Agency relationships & Other | Weighted Average |  |
Amortized Intangible Assets: |  |
Weighted Average Expected Life | 9 years |

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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