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Schedule II - Condensed Statements Of Cash Flows (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash flows from operating activities: |  |  |
Investment income received | $ 248 | $ 318 | $ 353
Operating expenses paid | (130) | (134) | (129)
Interest paid, net of interest converted to principal | (155) | (139) | (169)
Income taxes (paid) received | (4) | (5) | (9)
Net cash provided (used) by operating activities | (630) | (140) | (54)
Cash flows from investing activities: |  |  |
Purchases of available-for-sale investments | (1,811) | (2,661) | (2,146)
Sales of available-for-sale investments | 2,256 | 2,412 | 1,145
Paydowns and maturities of available-for-sale investments | 568 | 680 | 800
Purchases of investments at fair value | (263) | (199) | (390)
Sales, paydowns and maturities of investments at fair value | 326 | 260 | 551
Sales, paydowns and maturities (purchases) of short-term investments, net | (67) | (125) | 525
(Payments) proceeds for derivative settlements | (64) | (44) | 13
Collateral (to) from counterparties | 4 | 49 | (31)
Other investing | (23) | (8) | 47
Net cash provided (used) by investing activities | 1,202 | 2,424 | 817
Cash flows from financing activities: |  |  |
Proceeds from investment agreements | 17 | 19 | 24
Principal paydowns of investment agreements | (84) | (85) | (116)
Principal paydowns of long-term debt | 0 | 0 | (11)
Purchases of treasury stock | (330) | (110) | (304)
Net cash provided (used) by financing activities | (611) | (2,544) | (1,015)
Effect of exchange rate changes on cash and cash equivalents | (2) | (2) | (8)
Net increase (decrease) in cash and cash equivalents | (41) | (262) | (260)
Cash and cash equivalents - beginning of year | 187 | 522 | 782
Reclassification to assets held for sale | 0 | (73) | 0
Cash and cash equivalents - end of year | 146 | 187 | 522
Reconciliation of net income (loss) to net cash provided (used) by operating activities: [Abstract] |  |  |
Net income (loss) | (1,605) | (338) | 180
Change in: [Abstract] |  |  |
Net investment losses related to other-than-temporary impairments | 106 | 5 | 13
Net (gains) losses on financial instruments at fair value and foreign exchange | (106) | (84) | (105)
Other net realized (gains) losses | (59) | 282 | (17)
Deferred income tax provision (benefit) | 940 | (5) | 107
Other operating | (12) | 38 | 39
Total adjustments to net income (loss) | 975 | 198 | (234)
Net cash provided (used) by operating activities | (630) | (140) | (54)
Parent Company [Member] |  |  |
Cash flows from operating activities: |  |  |
Fees and reimbursements received | 0 | 4 | 0
Investment income received | 141 | 144 | 142
Operating expenses paid | (27) | (18) | (24)
Interest paid, net of interest converted to principal | (78) | (84) | (88)
Income taxes (paid) received | 26 | 73 | 108
Net cash provided (used) by operating activities | 62 | 119 | 138
Cash flows from investing activities: |  |  |
Purchases of available-for-sale investments | (164) | (129) | (606)
Sales of available-for-sale investments | 172 | 165 | 325
Paydowns and maturities of available-for-sale investments | 152 | 90 | 186
Purchases of investments at fair value | (70) | (57) | (144)
Sales, paydowns and maturities of investments at fair value | 71 | 58 | 171
Sales, paydowns and maturities (purchases) of short-term investments, net | (34) | 1 | 232
(Payments) proceeds for derivative settlements | (30) | (37) | 43
Collateral (to) from counterparties | 4 | 52 | (31)
Contributions to subsidiaries, net | (12) | (10) | 16
Advances to subsidiaries, net | (3) | 0 | 0
Other investing | 0 | 0 | 24
Net cash provided (used) by investing activities | 86 | 133 | 216
Cash flows from financing activities: |  |  |
Proceeds from investment agreements | 15 | 16 | 21
Principal paydowns of investment agreements | (81) | (80) | (111)
Proceeds from long-term debt | 127 | 0 | 0
Principal paydowns of long-term debt | 0 | 0 | (11)
Payments for affiliate loans | (156) | (111) | (103)
Purchases of treasury stock | (65) | (108) | (234)
Restricted stock awards settlements | 11 | 8 | 19
Net cash provided (used) by financing activities | (149) | (275) | (419)
Effect of exchange rate changes on cash and cash equivalents | (2) | 1 | 0
Net increase (decrease) in cash and cash equivalents | (3) | (22) | (65)
Cash and cash equivalents - beginning of year | 13 | 35 | 100
Cash and cash equivalents - end of year | 10 | 13 | 35
Reconciliation of net income (loss) to net cash provided (used) by operating activities: [Abstract] |  |  |
Net income (loss) | (1,605) | (338) | 180
Change in: [Abstract] |  |  |
Intercompany accounts receivable | (22) | (8) | (20)
Current income taxes | 48 | 78 | 109
Equity in earnings of subsidiaries | 1,024 | 262 | (189)
Dividends from subsidiaries | 118 | 118 | 116
Net investment losses related to other-than-temporary impairments | 0 | 1 | 4
Net (gains) losses on financial instruments at fair value and foreign exchange | 34 | 13 | (59)
Other net realized (gains) losses | 3 | 5 | (21)
Deferred income tax provision (benefit) | 485 | (20) | 0
(Gains) losses on extinguishment of debt | (28) | (5) | 0
Other operating | 5 | 13 | 18
Total adjustments to net income (loss) | 1,667 | 457 | (42)
Net cash provided (used) by operating activities | $ 62 | $ 119 | $ 138

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- Definition Amount of cash (inflow) outflow from investing activities classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3098-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3095-108585 + Details
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- Definition The net amount paid (received) by the reporting entity through acquisition or sale and maturities of short-term investments with an original maturity that is three months or less which qualify for treatment as an investing activity based on management's intention and intended by management to be liquidated, if necessary, within the current operating cycle. Includes cash flows from securities classified as trading securities that were acquired for reasons other than sale in the short-term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3098-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3095-108585 + Details
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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow to acquire debt and equity securities not classified as either held-to-maturity securities or trading securities which would be classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in a separate component of shareholders' equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3213-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 + Details
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- Definition The cash outflow to acquire securities classified as trading securities and held for investment purposes. Excludes payments for trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References No definition available. + Details
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- Definition Cash received for fees during the current period. This element excludes cash proceeds from license fees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition Cash received for dividends and interest on the entity's equity and debt investments during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3536-108585 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References No definition available. + Details
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- Definition Amount of cash inflow from issuance of long-term debt classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash inflow associated with maturities (principal being due), prepayments and calls (requests of early payments) on securities not classified as either held-to-maturity securities or trading securities which are classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + Details
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- Definition The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 + Details
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- Definition The cash inflow associated with the sale of securities classified as trading securities and held for investment purposes. Excludes proceeds from trading securities purchased and held principally for the purpose of selling them in the near term (thus held for only a short period of time). + References No definition available. + Details
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- Definition The cash inflow associated with the amount received from the stock plan during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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