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Deferred Policy Acquisition Costs - Progression of deferred policy acquisition costs (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward] |  |
Deferred policy acquisition costs and present value of future profits, beginning balance | $ 1,216 | $ 1,239
Deferred policy acquisition costs and present value of future profits, additions | 219 | 207
Deferred policy acquisition costs and present value of future profits, periodic amortization | (230) | (185)
Deferred policy acquisition costs and present value of future profits, change included in realized gains | 3 | 2
Deferred policy acquisition costs and present value of future profits, foreign currency translation | 1 | 1
Deferred policy acquisition costs and present value of future profits, change in unrealized | 208 | (59)
Deferred policy acquisition costs and present value of future profits, ending balance | 1,417 | 1,205
P&C |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Deferred policy acquisition costs, beginning balance | 270 | 238
Deferred policy acquisition costs, additions | 162 | 139
Deferred policy acquisition costs, periodic amortization | (154) | (135)
Deferred policy acquisition costs, foreign currency translation | 1 | 1
Deferred policy acquisition costs, ending balance | 279 | 243
Annuity and Other |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Deferred policy acquisition costs, beginning balance | 1,217 | 1,110
Deferred policy acquisition costs, additions | 57 | 67
Deferred policy acquisition costs, periodic amortization | (69) | (42)
Deferred policy acquisition costs, change included in realized gains | 3 | 2
Deferred policy acquisition costs, ending balance | 1,208 | 1,137
Movement in Deferred Sales Inducements [Roll Forward] |  |
Deferred sales inducements, beginning balance | 102 | 110
Deferred sales inducements, additions | 0 | 1
Deferred sales inducements, periodic amortization | (5) | (6)
Deferred sales inducements, change included in realized gains | 0 | 0
Deferred sales inducements, ending balance | 97 | 105
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Present value of future profits, beginning balance | 49 | 46
Present value of future profits, periodic amortization | (2) | (2)
Present value of future profits, ending balance | 47 | 44
Movement in Unrealized Gains (Losses) Related to Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward] |  |
Unrealized investment gains (losses), beginning balance | (422) | (265)
Unrealized investment gains (losses), change in unrealized | 208 | (59)
Unrealized investment gains (losses), ending balance | (214) | (324)
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward] |  |
Deferred policy acquisition costs and present value of future profits, beginning balance | 946 | 1,001
Deferred policy acquisition costs and present value of future profits, additions | 57 | 68
Deferred policy acquisition costs and present value of future profits, periodic amortization | (76) | (50)
Deferred policy acquisition costs and present value of future profits, change included in realized gains | 3 | 2
Deferred policy acquisition costs and present value of future profits, change in unrealized | 208 | (59)
Deferred policy acquisition costs and present value of future profits, ending balance | 1,138 | 962
Excluding Unrealized Gains | Annuity and Other |  |
Movement Analysis of Deferred Policy Acquisition Costs and Present Value of Future Profits [Roll Forward] |  |
Deferred policy acquisition costs and present value of future profits, beginning balance | 1,368 | 1,266
Deferred policy acquisition costs and present value of future profits, change in unrealized | 0 | 0
Deferred policy acquisition costs and present value of future profits, ending balance | $ 1,352 | $ 1,286

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- Definition Total amount of policy acquisition costs capitalized during the income statement period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415 + 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://www.xbrl.org/2003/role/presentationRef -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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