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CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Cash flows from operating activities |  |  |
Net Income (Loss) Attributable to Parent | $ 415 | $ 870 | $ 716
Change in operating assets and liabilities: |  |  |
Accrued investment income | (11) | (4) | 7
Premiums receivable and other reinsurance balances | 162 | 110 | (764)
Deferred policy acquisition costs | (95) | (198) | (107)
Reinsurance ceded receivable balances | (115) | (178) | 66
Future policy benefits, other policy claims and benefits, and other reinsurance balances | 2,819 | 1,537 | 1,593
Deferred income taxes | (16) | 211 | 77
Other assets and other liabilities, net | 225 | 113 | (163)
Amortization of net investment premiums, discounts and other | (46) | (55) | (57)
Depreciation, Depletion and Amortization | 49 | 49 | 45
Investment related (gains) losses, net | 33 | (91) | 170
Other, net | (98) | (57) | (2)
Net cash provided by operating activities | 3,322 | 2,307 | 1,581
Cash flows from investing activities |  |  |
Sales of fixed maturity securities available-for-sale | 6,514 | 13,214 | 9,340
Principal payments on mortgage loans on real estate | 973 | 907 | 627
Proceeds from Sale of Available-for-sale Securities, Equity | 181 | 98 | 46
Proceeds from Sale and Collection of Mortgage Notes Receivable | 661 | 490 | 445
Proceeds from Collection of Policy Loans | 102 | 82 | 57
Payments to Acquire Available-for-sale Securities | (9,619) | (15,664) | (9,724)
Payments to Acquire Available-for-sale Securities, Equity | (22) | (312) | (13)
Purchases of fixed maturity securities available-for-sale | (780) | (1,216) | (1,019)
Payments to Fund Policy Loans | (41) | (42) | (45)
Cash invested in funds withheld at interest | (131) | (60) | (54)
Purchase of businesses, net of cash acquired of $27 and $5 | 0 | 4 | (32)
Payments to Acquire Property, Plant, and Equipment | (28) | (34) | (29)
Change in short-term investments | (155) | 199 | 129
Change in other invested assets | (335) | (304) | (365)
Net cash used in investing activities | (2,680) | (2,638) | (637)
Cash flows from financing activities |  |  |
Dividends to stockholders | (182) | (163) | (140)
Proceeds from Issuance of Common Stock | 481 | 0 | 0
Repayment of collateral finance and securitization notes | (214) | (91) | (96)
Proceeds from long-term debt issuance | 598 | 599 | 0
Debt issuance costs | (5) | (5) | 0
Principal payments of long-term debt | (3) | (403) | (3)
Purchases of treasury stock | (163) | (101) | (300)
Exercise of stock options, net | 1 | 6 | 3
Change in cash collateral for derivative positions and other arrangements | (32) | (163) | 44
Deposits on universal life and other investment type policies and contracts | 1,576 | 1,309 | 864
Withdrawals on universal life and other investment type policies and contracts | (803) | (1,109) | (694)
Net cash provided by (used in) financing activities | 1,254 | (121) | (322)
Effect of exchange rate changes on cash | 63 | 11 | (36)
Change in cash and cash equivalents | 1,959 | (441) | 586
Cash and cash equivalents, beginning of period | 1,449 | 1,890 | 1,304
Cash and cash equivalents, end of period | 3,408 | 1,449 | 1,890
Supplementary information: |  |  |
Interest paid | 166 | 180 | 170
Income taxes paid, net of refunds | 108 | 44 | 142
Transfer to Investments | 93 | 6,275 | 4,636
Capital Expenditures Incurred but Not yet Paid | 23 | 1 | 0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets | 0 | 8 | 70
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities | $ 0 | $ (12) | $ (38)

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