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Deferred Policy Acquisition Costs - Progression of deferred policy acquisition costs (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016
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 | $ 1,239 | $ 1,184
Deferred policy acquisition costs and present value of future profits, additions | 207 | 205
Deferred policy acquisition costs and present value of future profits, periodic amortization | (185) | (166)
Deferred policy acquisition costs and present value of future profits, change included in realized gains | 2 | 2
Deferred policy acquisition costs and present value of future profits, foreign currency translation | 1 |
Deferred policy acquisition costs and present value of future profits, change in unrealized | (59) | (170)
Deferred policy acquisition costs and present value of future profits, ending balance | 1,205 | 1,055
P&C |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Deferred policy acquisition costs, beginning balance | 238 | 226
Deferred policy acquisition costs, additions | 139 | 132
Deferred policy acquisition costs, periodic amortization | (135) | (134)
Deferred policy acquisition costs, foreign currency translation | 1 |
Deferred policy acquisition costs, ending balance | 243 | 224
Annuity and Run-off Long-term Care and Life |  |
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |
Deferred policy acquisition costs, beginning balance | 1,110 | 1,018
Deferred policy acquisition costs, additions | 67 | 68
Deferred policy acquisition costs, periodic amortization | (42) | (25)
Deferred policy acquisition costs, change included in realized gains | 2 | 2
Deferred policy acquisition costs, ending balance | 1,137 | 1,063
Movement in Deferred Sales Inducements [Roll Forward] |  |
Deferred sales inducements, beginning balance | 110 | 119
Deferred sales inducements, additions | 1 | 5
Deferred sales inducements, periodic amortization | (6) | (5)
Deferred sales inducements, change included in realized gains | 0 | 0
Deferred sales inducements, ending balance | 105 | 119
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Present value of future profits, beginning balance | 46 | 55
Present value of future profits, periodic amortization | (2) | (2)
Present value of future profits, ending balance | 44 | 53
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 | (265) | (234)
Unrealized investment gains (losses), change in unrealized | (59) | (170)
Unrealized investment gains (losses), ending balance | (324) | (404)
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 | 1,001 | 958
Deferred policy acquisition costs and present value of future profits, additions | 68 | 73
Deferred policy acquisition costs and present value of future profits, periodic amortization | (50) | (32)
Deferred policy acquisition costs and present value of future profits, change included in realized gains | 2 | 2
Deferred policy acquisition costs and present value of future profits, change in unrealized | (59) | (170)
Deferred policy acquisition costs and present value of future profits, ending balance | 962 | 831
Excluding Unrealized Gains | Annuity and Run-off Long-term Care and Life |  |
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 | 1,266 | 1,192
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 | $ 1,286 | $ 1,235

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- Definition Amount of increase (decrease) in deferred policy acquisition cost (DAC) and present value of future profits due to the effect of foreign currency translation. + References No definition available. + Details
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- Definition Adjustment to deferred policy acquisition cost (DAC) and present value of future profits due to unrealized investment gain (loss). + References No definition available. + Details
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- Definition Amount of amortization expense (reversal of amortization expense) of deferred policy acquisition costs from realized net investment gain (loss). + 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 (c) -URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 35 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=49177698&loc=d3e10138-158409 + Details
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- Definition Net amount of deferred policy acquisition costs capitalized on contracts remaining in force as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 825 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6487548&loc=d3e32546-158582 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=68057816&loc=d3e11446-158418 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18(Column B)) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e575016-122915 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6481648&loc=d3e11198-158413 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16(Column B)) -URI http://asc.fasb.org/extlink&oid=34713774&loc=d3e574960-122915 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(7)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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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 Additions during the period in (a) capitalized policy acquisition costs, and (b) capitalized present value of future profits (also known as PVFP). + 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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- Definition Amount of deferred policy acquisition costs and capitalized present value of the future profits (PVFP) expensed. Acquisition costs are costs that are related directly to the successful acquisition of new or renewal insurance contracts. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=35755530&loc=d3e11264-158415 + Details
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- Definition Carrying (unamortized) amount as of the balance sheet date of deferred policy acquisition costs and value of business acquired (also called present value of future profits). + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.7) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: 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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- Definition The amount of deferred sales inducement costs capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6481800&loc=d3e11332-158416 + Details
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