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CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Cash Flows from Operating Activities |  |
Net Income | $ 273.5 | $ 229.9
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities |  |
Change in Receivables | (29.4) | (18.2)
Change in Deferred Acquisition Costs | (17.8) | (20.6)
Change in Insurance Reserves and Liabilities | 183.8 | 128.7
Change in Income Taxes | 56.4 | 92.5
Change in Other Accrued Liabilities | (110.4) | (18.3)
Non-cash Components of Net Investment Income | (95.2) | (103.7)
Net Realized Investment (Gain) Loss | 2.2 | (11.0)
Depreciation | 24.6 | 26.5
Other, Net | 12.2 | 4.4
Net Cash Provided by Operating Activities | 299.9 | 310.2
Cash Flows from Investing Activities |  |
Proceeds from Sales of Fixed Maturity Securities | 84.8 | 154.3
Proceeds from Maturities of Fixed Maturity Securities | 469.8 | 568.3
Proceeds from Sales and Maturities of Other Investments | 82.3 | 46.5
Purchases of Fixed Maturity Securities | (835.4) | (774.7)
Purchases of Other Investments | (90.0) | (95.7)
Net Sales of Short-term Investments | 450.9 | 10.4
Net Decrease in Payables for Collateral on Investments | (14.0) | (8.4)
Net Purchases of Property and Equipment | (29.1) | (27.3)
Net Cash Provided (Used) by Investing Activities | 119.3 | (126.6)
Cash Flows from Financing Activities |  |
Long-term Debt Repayments | (15.0) | (15.2)
Issuance of Common Stock | 1.3 | 1.0
Repurchase of Common Stock | (105.7) | (106.9)
Dividends Paid to Stockholders | (52.4) | (46.5)
Other, Net | (15.9) | (9.4)
Net Cash Used by Financing Activities | (187.7) | (177.0)
Net Increase in Cash and Bank Deposits | 231.5 | 6.6
Cash and Bank Deposits at Beginning of Year | 77.4 | 100.4
Cash and Bank Deposits at End of Period | $ 308.9 | $ 107.0

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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