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Deferred Policy Acquisition and Sales Inducement Costs (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Deferred policy acquisition costs |  |  |
Balance, beginning of year | $ 4,191 | $ 3,954 | $ 3,861
SquareTrade acquisition | 0 | 66 | 0
Acquisition costs deferred | 5,663 | 5,001 | 4,717
Amortization charged to income | (5,222) | (4,784) | (4,550)
Effect of unrealized gains and losses | 152 | (46) | (74)
Balance, end of year | 4,784 | 4,191 | 3,954
DSI activity relates to fixed annuities and interest-sensitive life contracts |  |  |
Balance, beginning of year | 36 | 40 | 45
Sales inducements deferred | 0 | 0 | 1
Amortization charged to income | (4) | (4) | (5)
Effect of unrealized gains and losses | 2 | 0 | (1)
Balance, end of year | 34 | $ 36 | $ 40
Accounting Standards Update 2014-09 |  |  |
Deferred policy acquisition costs |  |  |
Acquisition costs deferred | 152 |  |
Amortization charged to income | $ 101 |  |

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- Definition Represents the impact of unrealized capital gains and losses on the carrying amount of (a) capitalized costs that vary with and are primarily related to the acquisition of new and renewal insurance contracts and coverages, and (b) capitalized present value of future profits (also known as value of business acquired). + References No definition available. + Details
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- Definition Amount of addition in deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=27015749&loc=d3e569990-122904 + Details
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