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Schedule II - Condensed Statements Of Cash Flows (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Cash flows from operating activities: |  |  |
Investment income received | $ 353 | $ 419 | $ 426
Operating expenses paid | (130) | (238) | (277)
Interest paid, net of interest converted to principal | (169) | (179) | (224)
Income taxes (paid) received | (9) | (17) | (1)
Net cash provided (used) by operating activities | (55) | (333) | 1,829
Cash flows from investing activities: |  |  |
Purchases of available-for-sale investments | (2,146) | (1,494) | (2,397)
Sales of available-for-sale investments | 1,145 | 757 | 1,726
Paydowns and maturities of available-for-sale investments | 800 | 484 | 452
Purchases of investments at fair value | (390) | (631) | (371)
Sales, paydowns and maturities of investments at fair value | 551 | 789 | 595
Sales, paydowns and maturities (purchases) of short-term investments, net | 525 | 515 | (358)
Proceeds From Sales Maturities Prepayments and Calls Of Other Investments | 0 | 1 | 0
(Payments) proceeds for derivative settlements | 13 | (26) | (54)
Collateral (to) from swap counterparty | (31) | 144 | 122
Other investing | 47 | 0 | 0
Net cash provided (used) by investing activities | 817 | 812 | (6)
Cash flows from financing activities: |  |  |
Proceeds from investment agreements | 24 | 30 | 31
Principal paydowns of investment agreements | (116) | (192) | (285)
Principal paydowns of long-term debt | (11) | 0 | (3)
Purchases of treasury stock | (303) | (32) | 0
Net cash provided (used) by financing activities | (1,014) | (892) | (1,566)
Effect of exchange rate changes on cash and cash equivalents | (8) | (8) | 11
Net increase (decrease) in cash and cash equivalents | (260) | (421) | 268
Cash and cash equivalents - beginning of year | 782 | 1,258 | 990
Cash and cash equivalents - end of year | 522 | 782 | 1,258
Reconciliation of net income (loss) to net cash provided (used) by operating activities: [Abstract] |  |  |
Net income (loss) | 180 | 569 | 250
Change in: [Abstract] |  |  |
Net investment losses related to other-than-temporary impairments | 13 | 15 | 0
Net (gains) losses on financial instruments at fair value and foreign exchange | (105) | (128) | (244)
Other net realized (gains) losses | (17) | (25) | 28
Deferred income tax provision (benefit) | 107 | 50 | 157
(Gains) losses on extinguishment of debt | 0 | 0 | (61)
Other operating | 38 | 114 | 103
Total adjustments to net income (loss) | (235) | (902) | 1,579
Net cash provided (used) by operating activities | (55) | (333) | 1,829
Parent Company [Member] |  |  |
Cash flows from operating activities: |  |  |
Fees and reimbursements received | 0 | 1 | 0
Investment income received | 142 | 256 | 250
Operating expenses paid | (25) | (35) | (35)
Interest paid, net of interest converted to principal | (88) | (93) | (93)
Income taxes (paid) received | 108 | 59 | 111
Net cash provided (used) by operating activities | 137 | 188 | 233
Cash flows from investing activities: |  |  |
Purchases of available-for-sale investments | (606) | (125) | (287)
Sales of available-for-sale investments | 325 | 268 | 147
Paydowns and maturities of available-for-sale investments | 186 | 98 | 252
Purchases of investments at fair value | (144) | (266) | (144)
Sales, paydowns and maturities of investments at fair value | 171 | 280 | 126
Sales, paydowns and maturities (purchases) of short-term investments, net | 232 | (242) | 94
(Payments) proceeds for derivative settlements | 43 | (26) | (32)
Collateral (to) from swap counterparty | (31) | 144 | 122
Contributions to subsidiaries, net | 16 | (20) | 2
Advances to subsidiaries, net | 0 | (12) | 0
Other investing | 24 | 0 | 0
Net cash provided (used) by investing activities | 216 | 99 | 280
Cash flows from financing activities: |  |  |
Proceeds from investment agreements | 21 | 23 | 25
Principal paydowns of investment agreements | (111) | (181) | (274)
Payments for securities sold under agreements to repurchase | 0 | 0 | (32)
Principal paydowns of long-term debt | (11) | 0 | (3)
Payments for affiliate loans | (103) | (153) | (194)
Purchases of treasury stock | (233) | (32) | 0
Restricted stock awards settlements | 19 | 16 | 13
Net cash provided (used) by financing activities | (418) | (327) | (465)
Net increase (decrease) in cash and cash equivalents | (65) | (40) | 48
Cash and cash equivalents - beginning of year | 100 | 140 | 92
Cash and cash equivalents - end of year | 35 | 100 | 140
Reconciliation of net income (loss) to net cash provided (used) by operating activities: [Abstract] |  |  |
Net income (loss) | 180 | 569 | 250
Change in: [Abstract] |  |  |
Intercompany accounts receivable | (21) | (24) | (14)
Current income taxes | 109 | 70 | 116
Equity in earnings of subsidiaries | (189) | (463) | (118)
Dividends from subsidiaries | 116 | 225 | 219
Net investment losses related to other-than-temporary impairments | 4 | 0 | 0
Net (gains) losses on financial instruments at fair value and foreign exchange | (59) | (24) | (11)
Other net realized (gains) losses | (21) | (1) | 0
Deferred income tax provision (benefit) | 0 | (176) | (207)
(Gains) losses on extinguishment of debt | 0 | (1) | (43)
Other operating | 18 | 13 | 41
Total adjustments to net income (loss) | (43) | (381) | (17)
Net cash provided (used) by operating activities | $ 137 | $ 188 | $ 233

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- Definition Other income (expense) included in net income that results in no cash inflows or outflows in the period. Includes noncash adjustments to reconcile net income (loss) to cash provided by (used in) operating activities that are not separately disclosed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition Total amount of cash paid for operating activities 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 (d)-(g) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments. + References No definition available. + Details
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- Definition The net cash outflow or inflow from other investing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + 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=31042434&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=31042434&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=31042434&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=31042434&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=31042434&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=31042434&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=6871852&loc=d3e26853-111562 + 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=31042434&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=31042434&loc=d3e3536-108585 + Details
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- Definition The cash inflow from other long-term borrowings not otherwise defined in the taxonomy (with maturities initially due beyond one year or the normal operating cycle of the entity, 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 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&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=31042434&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=6871852&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 flow from investments sold under the agreement to repurchase such investment. + References Reference 1: 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=31042434&loc=d3e3095-108585 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 Reference 3: 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=31042434&loc=d3e3098-108585 + 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=6871852&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=31042434&loc=d3e3179-108585 + 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=31042434&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=31042434&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 attributable to repayments of borrowings not otherwise defined in the taxonomy (with maturities initially due after one year or beyond 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=31042434&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=31042434&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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