| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Cash flows from operating activities: | | | | | | | | |
| Insurance policy income | | | | | | | | |
| Net investment income | | | | | | | | |
| Fee revenue and other income | | | | | | | | |
| Insurance policy benefits | | | | | | | | |
| Interest expense | -69.5 | -38.6 | -55.1 | -18.5 | -37.6 | -9.7 | -35.4 | -11.1 |
| Deferrable policy acquisition costs | -96.6 | -89.8 | -86.5 | -80.2 | -83.7 | -83.7 | -85.5 | -70.5 |
| Other operating costs | -216.8 | -320.2 | -228.3 | -208.0 | -237.6 | -309.9 | -240.5 | -211.0 |
| Net cash from operating activities | 141.5 | 81.9 | 160.9 | 167.5 | 110.6 | 56.4 | 119.3 | 240.7 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Sales of investments | 260.8 | 486.5 | 488.7 | 538.8 | 705.5 | 1,520.6 | 403.9 | 327.2 |
| Purchases of investments | -758.4 | -1,147.7 | -960.9 | -1,168.0 | -1,357.9 | -2,995.2 | -1,771.4 | -1,245.3 |
| Net purchases of trading securities | -22.4 | -8.4 | | | 15.4 | -17.3 | | |
| Other | -8.7 | -13.9 | -21.8 | -14.6 | -11.5 | -13.3 | -7.3 | -7.7 |
| Net cash used by investing activities | -145.2 | -406.7 | -213.4 | -337.6 | -220.0 | -1,010.3 | -730.7 | -245.0 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Issuance of common stock | 0.5 | 8.1 | 6.9 | 1.9 | 0.7 | 4.0 | 2.9 | 1.1 |
| Payments to repurchase common stock | -29.8 | -25.8 | -9.9 | -10.1 | -60.3 | -109.8 | -100.0 | -120.3 |
| Common stock dividends paid | -17.4 | -17.1 | -16.1 | -16.1 | -16.5 | -16.1 | -15.8 | -16.3 |
| Proceeds from financing arrangements | 43.0 | | | | | | | |
| Amounts received for deposit products | 537.4 | 498.3 | 564.8 | 499.1 | 566.1 | 1,392.6 | 1,025.8 | 461.8 |
| Withdrawals from deposit products | -425.5 | -422.1 | -390.4 | -359.4 | -347.4 | -364.2 | -353.2 | -322.5 |
| Issuance of investment borrowings: | | | | | | | | |
| Federal Home Loan Bank | -0.1 | 200.1 | -0.4 | -0.3 | -0.3 | -75.3 | -25.3 | 99.7 |
| Payments on investment borrowings: | | | | | | | | |
| Federal Home Loan Bank | -0.1 | 200.1 | -0.4 | -0.3 | -0.3 | -75.3 | -25.3 | 99.7 |
| Related to variable interest entities | -64.6 | -39.5 | | | -7.5 | -15.0 | | |
| Net cash provided by financing activities | 43.5 | 202.0 | 143.9 | 104.2 | 134.8 | 816.2 | 530.5 | 102.1 |
| Net decrease in cash and cash equivalents | 39.8 | -122.8 | | | 25.4 | -137.7 | | |