v3.8.0.1

Certain Long-Duration Contracts with Guarantees (Liabilities for Guarantee Benefits) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
GMDB | Variable Life, Variable Universal Life and Universal Life Contracts |  |  |
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward] |  |  |
Beginning balance | $ 4,143 | $ 3,150 | $ 2,850
Incurred guarantee benefits | 685 | 927 | 517
Paid guarantee benefits and other | (15) | (36) | (22)
Change in unrealized investment gains and losses | 290 | 102 | (193)
Other | 7 | 0 | (2)
Ending balance | 5,110 | 4,143 | 3,150
GMDB | Annuity Contracts |  |  |
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward] |  |  |
Beginning balance | 721 | 714 | 642
Incurred guarantee benefits | 37 | 98 | 167
Paid guarantee benefits and other | (74) | (91) | (85)
Change in unrealized investment gains and losses | 13 | 0 | (10)
Other | 0 | 0 | 0
Ending balance | 697 | 721 | 714
GMIB | Annuity Contracts |  |  |
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward] |  |  |
Beginning balance | 474 | 440 | 467
Incurred guarantee benefits | (20) | (18) | (40)
Paid guarantee benefits and other | (15) | (15) | (16)
Change in unrealized investment gains and losses | (30) | 49 | 41
Other | 10 | 18 | (12)
Ending balance | 419 | 474 | 440
GMAB/GMWB/GMIWB | Annuity Contracts |  |  |
Movement in Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Gross [Roll Forward] |  |  |
Beginning balance | 8,238 | 8,433 | 8,182
Incurred guarantee benefits | 479 | (194) | 252
Paid guarantee benefits and other | 0 | 0 | 0
Change in unrealized investment gains and losses | 0 | 0 | 0
Other | 4 | (1) | (1)
Ending balance | $ 8,721 | $ 8,238 | $ 8,433

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- Definition Amount of unrealized investment gains and losses, liability for guarantee benefits on long-duration contracts + References No definition available. + Details
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- Definition Amount of expected guaranteed benefits in excess of the projected account balances for minimum guaranteed benefit contracts, 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 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 + Details
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- Definition Amount of guaranteed minimum benefit expense incurred for expected guaranteed minimum benefits in excess of projected account values. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d)(4) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 + Details
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- Definition Net amount of other increases or decreases to the liability for guaranteed minimum benefits on long-duration contracts occurring during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d)(3) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 + Details
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- Definition Amount of cash outflow to policyholders and contract holders for guaranteed minimum benefit payments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=6588021&loc=d3e7104-158389 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 80 -Section 50 -Paragraph 1 -Subparagraph (d)(4) -URI http://asc.fasb.org/extlink&oid=6484115&loc=d3e19393-158473 + Details
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