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Accumulated Other Comprehensive Income Loss Level 4- Reclassifications from AOCI (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net realized capital gains (losses) | $ (30) | $ 25
Income before income taxes | 519 | 401
Net investment income | 451 | 410
Income tax expense | 91 | 98
Income (Loss) from Discontinued Operations, Net of Tax | 169 | 75
Net Income (Loss) Attributable to Parent | 597 | 378
Operating Expenses | 1,037 | 919
Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net Income (Loss) Attributable to Parent | (23) | 27
Net Unrealized Gain on Securities | Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net realized capital gains (losses) | (38) | 14
Income before income taxes | (38) | 14
Income tax expense | (8) | 5
Income (Loss) from Discontinued Operations, Net of Tax | 3 | 14
Net Income (Loss) Attributable to Parent | (27) | 23
Net Gain on Cash Flow Hedging Instruments | Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Income before income taxes | 9 | 13
Income tax expense | 2 | 4
Income (Loss) from Discontinued Operations, Net of Tax | 6 | 5
Net Income (Loss) Attributable to Parent | 13 | 14
Amortization of Prior Service Credit | Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Operating Expenses | 1 | 1
Amortization of Actuarial Loss | Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Operating Expenses | (13) | (16)
Pension and Other Postretirement Plan Adjustments | Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Income before income taxes | (12) | (15)
Income tax expense | (3) | (5)
Net Income (Loss) Attributable to Parent | (9) | (10)
Interest Rate Swap [Member] | Net Gain on Cash Flow Hedging Instruments | Amount Reclassified from AOCI |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |
Net realized capital gains (losses) | 1 | 4
Net investment income | $ 8 | $ 9

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- Definition This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (b)(7) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20187-122688 + Details
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- Definition Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5C -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721675-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3B -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721525-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3A -URI http://asc.fasb.org/extlink&oid=65878427&loc=SL51721523-107759 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e957-107759 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=65878427&loc=d3e1012-107759 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64827811&loc=d3e1361-107760 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64827811&loc=SL51721673-107760 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=96868048&loc=SL4569616-111683 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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