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SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Statements Of Cash Flows) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ 816 | [1] | $ 418 | $ 411 | $ 435 | $ 189 | [1] | $ 467 | $ 325 | $ 211 | $ 2,079 | $ 1,192 | $ 1,154
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  |  |  |  |  |  |  |  |  |  |  | 213 | 278 | 109
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  |  |  | 788 | 1,272 | 2,243
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net change in collateral on investments and derivatives |  |  |  |  |  |  |  |  |  |  |  | (429) | 415 | 578
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  |  |  |  | (4,188) | (3,666) | (4,223)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of long-term debt, including current maturities |  |  |  |  |  |  |  |  |  |  |  |  | (600) | (250)
Issuance of long-term debt, net of issuance costs |  |  |  |  |  |  |  |  |  |  |  |  | 395 | 298
Payment related to early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  | (59) |
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  | (725) | (879) | (900)
Dividends paid to common stockholders |  |  |  |  |  |  |  |  |  |  |  | (262) | (238) | (204)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  | 2,306 | 1,970 | 1,207
Net increase (decrease) in cash and invested cash |  |  |  |  |  |  |  |  |  |  |  | (1,094) | (424) | (773)
Cash and invested cash as of beginning-of-year |  |  |  |  |  | 2,722 |  |  |  |  | 3,146 | 2,722 | 3,146 | 3,919
Cash and invested cash as of end-of-year |  | 1,628 |  |  |  |  | 2,722 |  |  |  |  | 1,628 | 2,722 | 3,146
Parent Company [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Flows from Operating Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  |  |  | 2,079 | 1,192 | 1,154
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity in (income) loss of subsidiaries greater than distributions | [2] |  |  |  |  |  |  |  |  |  |  | (1,166) | (325) | (92)
Realized (gain) loss |  |  |  |  |  |  |  |  |  |  |  | 3 |  |
Change in federal income tax accruals |  |  |  |  |  |  |  |  |  |  |  | 107 | 120 | 106
Other |  |  |  |  |  |  |  |  |  |  |  | 20 | 54 | (74)
Net cash provided by (used in) operating activities |  |  |  |  |  |  |  |  |  |  |  | 1,043 | 1,041 | 1,094
Cash Flows from Investing Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net change in collateral on investments and derivatives |  |  |  |  |  |  |  |  |  |  |  | 3 |  |
Capital contribution to subsidiaries | [2] |  |  |  |  |  |  |  |  |  |  | (60) |  | (75)
Increase (decrease) in collateral on investments |  |  |  |  |  |  |  |  |  |  |  | (45) | (23) | (38)
Net cash provided by (used in) investing activities |  |  |  |  |  |  |  |  |  |  |  | (102) | (23) | (113)
Cash Flows from Financing Activities |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payment of long-term debt, including current maturities |  |  |  |  |  |  |  |  |  |  |  |  | (350) | (250)
Issuance of long-term debt, net of issuance costs |  |  |  |  |  |  |  |  |  |  |  |  | 395 | 300
Payment related to early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  | (59) |
Increase (decrease) in loans from subsidiaries, net | [2] |  |  |  |  |  |  |  |  |  |  | (230) | 37 | 68
Increase (decrease) in loans to subsidiaries, net | [2] |  |  |  |  |  |  |  |  |  |  | 239 | (20) | (27)
Common stock issued for benefit plans and excess tax benefits |  |  |  |  |  |  |  |  |  |  |  | 46 | 26 | 47
Repurchase of common stock |  |  |  |  |  |  |  |  |  |  |  | (725) | (879) | (900)
Dividends paid to common stockholders |  |  |  |  |  |  |  |  |  |  |  | (262) | (238) | (204)
Net cash provided by (used in) financing activities |  |  |  |  |  |  |  |  |  |  |  | (932) | (1,088) | (966)
Net increase (decrease) in cash and invested cash |  |  |  |  |  |  |  |  |  |  |  | 9 | (70) | 15
Cash and invested cash as of beginning-of-year |  |  |  |  |  | $ 611 |  |  |  |  | $ 681 | 611 | 681 | 666
Cash and invested cash as of end-of-year |  | $ 620 |  |  |  |  | $ 611 |  |  |  |  | $ 620 | $ 611 | $ 681
[1] | Fourth quarter 2017 results include a goodwill impairment charge and the impacts of remeasuring our existing deferred tax balances for the impact of the Tax Act as disclosed elsewhere herein
[2] | Eliminated in consolidation.

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