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Consolidated Balance Sheets Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Available-for-sale Debt Securities, Amortized Cost Basis | $ 53,805 | $ 56,965
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 5 | 166
Available-for-sale Equity Securities, Amortized Cost Basis | 1,020 | 1,135
Available-for-sale Securities, Equity Securities | $ 1,097 | $ 1,121
Common Stock, Par or Stated Value Per Share | $ 0.01 | $ 0.01
Common Stock, Shares Authorized | 1,500,000,000 | 1,500,000,000
Common Stock, Shares, Issued | 402,923,222 | 490,923,222
Treasury Stock, Shares | 28,974,069 | 89,102,038
Equity Securities [Member] |  |
Available-for-sale Equity Securities, Amortized Cost Basis |  | $ 293
Available-for-sale Securities, Equity Securities | $ 0 | 282
Fixed Maturities [Member] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 0 | 150
Equity Securities [Member] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 0 | 1
Other Assets [Member] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 0 | 0
Short-term Investments [Member] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 0 | 3
Cash [Member] |  |
Variable Interest Entity, Consolidated, Carrying Amount, Assets | 5 | 10
Commercial Loan [Member] |  |
Allowance for Loan and Lease Losses, Real Estate | $ 19 | $ 23

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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=6873192&loc=d3e21338-158488 + Details
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