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Schedule II Condensed Financial Information of the Hartford Financial Services, Inc. - Cash Flow Disclosures (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating Activities |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | $ 196 | $ 432 | $ 582 | $ 597 | $ (3,703) | $ 234 | $ (40) | $ 378 |  | $ 1,807 | $ (3,131) | $ 896
Loss on extinguishment of debt |  |  |  |  |  |  |  |  | $ (6) | (6) | 0 | 0
Realized Investment Gains (Losses) |  |  |  |  |  |  |  |  |  | 112 | (165) | 110
Cash provided by operating activities |  |  |  |  |  |  |  |  |  | 2,843 | 2,186 | 2,066
Investing Activities |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from (payments for) short-term investments |  |  |  |  |  |  |  |  |  | (3,460) | (144) | (1,377)
Payments for (Proceeds from) Other Investing Activities |  |  |  |  |  |  |  |  |  | (3) | 21 | (129)
Net additions to property and equipment |  |  |  |  |  |  |  |  |  | (122) | (250) | (224)
Net cash provided by (used for) investing activities |  |  |  |  |  |  |  |  |  | (1,962) | (1,442) | 949
Financing Activities |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock acquired |  |  |  |  |  |  |  |  |  |  | (1,028) | (1,330)
Dividends paid on common shares |  |  |  |  |  |  |  |  |  | (379) | (341) | (334)
Net cash used for financing activities |  |  |  |  |  |  |  |  |  | (1,467) | (979) | (2,541)
Cash — beginning of period |  |  |  | 180 |  |  |  | 328 | 180 | 180 | 328 | 143
Cash — end of period | 121 |  |  |  | 180 |  |  |  |  | 121 | 180 | 328
Supplemental Disclosure of Cash Flow Information |  |  |  |  |  |  |  |  |  |  |  |
Interest Paid |  |  |  |  |  |  |  |  |  | 292 | 322 | 336
Parent Company |  |  |  |  |  |  |  |  |  |  |  |
Operating Activities |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  |  |  |  |  |  |  |  |  | 1,807 | (3,131) | 896
Loss on extinguishment of debt |  |  |  |  |  |  |  |  |  | (6) | 0 | 0
Equity in net loss (income) of subsidiaries |  |  |  |  |  |  |  |  |  | (1,397) | 1,972 | (1,101)
Realized Investment Gains (Losses) |  |  |  |  |  |  |  |  |  | (37) | 1 | 6
Change in operating assets and liabilities |  |  |  |  |  |  |  |  |  | 2,362 | 3,220 | 1,634
Cash provided by operating activities |  |  |  |  |  |  |  |  |  | 2,778 | 2,061 | 1,429
Investing Activities |  |  |  |  |  |  |  |  |  |  |  |
Net proceeds from (payments for) short-term investments |  |  |  |  |  |  |  |  |  | (2,161) | (121) | 30
Net additions to property and equipment |  |  |  |  |  |  |  |  |  | (69) | 0 | 0
Capital returned from (contributions to) subsidiaries |  |  |  |  |  |  |  |  |  | (148) | (633) | 491
Net cash provided by (used for) investing activities |  |  |  |  |  |  |  |  |  | (2,378) | (754) | 521
Financing Activities |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  |  |  |  |  |  |  |  |  | 490 | 500 | 0
Repayments of long-term debt |  |  |  |  |  |  |  |  |  | (826) | (416) | (275)
Preferred stock issued, net of issuance costs |  |  |  |  |  |  |  |  |  | 334 | 0 | 0
Treasury stock acquired |  |  |  |  |  |  |  |  |  |  | (1,028) | (1,330)
Net issuance (return of) shares under incentive and stock compensation plans |  |  |  |  |  |  |  |  |  | (18) | (20) | (11)
Dividends paid on common shares |  |  |  |  |  |  |  |  |  | (379) | (341) | (334)
Net cash used for financing activities |  |  |  |  |  |  |  |  |  | (399) | (1,305) | (1,950)
Net increase in cash |  |  |  |  |  |  |  |  |  | 1 | 2 | 0
Cash — beginning of period |  |  |  | $ 2 |  |  |  | $ 0 | $ 2 | 2 | 0 | 0
Cash — end of period | $ 3 |  |  |  | $ 2 |  |  |  |  | 3 | 2 | 0
Supplemental Disclosure of Cash Flow Information |  |  |  |  |  |  |  |  |  |  |  |
Interest Paid |  |  |  |  |  |  |  |  |  | 290 | 312 | 326
Dividends Received from Subsidiaries |  |  |  |  |  |  |  |  |  | $ 3,115 | $ 2,142 | $ 1,320

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