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Schedule V - Valuation Allowances and Qualifying Accounts (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Allowance for reinsurance recoverables |  |  |
Valuation allowances and qualifying accounts |  |  |
Balance as of beginning of period | $ 65 | $ 70 | $ 84
Additions, Charged to costs and expenses | (2) | (5) | (10)
Additions, Other additions | 0 | 0 | 0
Deductions | 0 | 0 | 4
Balance as of end of period | 63 | 65 | 70
Allowance for premium installment receivable |  |  |
Valuation allowances and qualifying accounts |  |  |
Balance as of beginning of period | 77 | 77 | 84
Additions, Charged to costs and expenses | 137 | 118 | 109
Additions, Other additions | 0 | 0 | 0
Deductions | 124 | 118 | 116
Balance as of end of period | 90 | 77 | 77
Allowance for deferred tax assets |  |  |
Valuation allowances and qualifying accounts |  |  |
Balance as of beginning of period | 0 | 0 | 0
Additions, Charged to costs and expenses | 0 | 0 | 0
Additions, Other additions | 0 | 0 | 0
Deductions | 0 | 0 | 0
Balance as of end of period | 0 | 0 | 0
Allowance for estimated losses on mortgage loans |  |  |
Valuation allowances and qualifying accounts |  |  |
Balance as of beginning of period | 3 | 3 | 3
Additions, Charged to costs and expenses | 0 | 0 | 1
Additions, Other additions | 0 | 0 | 0
Deductions | 0 | 0 | 1
Balance as of end of period | 3 | 3 | 3
Allowance for estimated losses on agent loans |  |  |
Valuation allowances and qualifying accounts |  |  |
Balance as of beginning of period | 2 | 2 |
Additions, Charged to costs and expenses | 1 | 0 |
Additions, Other additions | 0 | 0 |
Deductions | 0 | 0 |
Balance as of end of period | $ 3 | $ 2 | $ 2

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690 + Details
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