| Net Income | 133.66 | 141.21 | 106.14 | 101.42 | 112.51 | 106.01 | |
| Depreciation & Amortization | 1.89 | 1.34 | 2.36 | 3.45 | 3.48 | 2.24 | |
| Loss (Gain) From Sale of Investments | -8.06 | -10.94 | -9.13 | 1.38 | - | - | |
| Stock-Based Compensation | 73.75 | 61.35 | 48.94 | 42.44 | 42.93 | 33.54 | |
| Other Operating Activities | -50.53 | -40.19 | -29.49 | -33.91 | 9.44 | 15.54 | |
| Change in Accounts Receivable | -10.73 | -12.85 | -10.07 | -3.43 | -1.43 | -6.27 | |
| Change in Inventory | -3.02 | 0.31 | 1.27 | 1.2 | 3.44 | -3.51 | |
| Change in Accounts Payable | 4.17 | -2.25 | 5.78 | 4.76 | -3.6 | 3.16 | |
| Change in Income Taxes | 3.74 | 3.78 | 1.21 | 8.69 | 0.01 | 0.01 | |
| Change in Other Net Operating Assets | 37.33 | 56.32 | 10.03 | -5.67 | 1.1 | 1.25 | |
| Operating Cash Flow | 182.19 | 198.07 | 127.04 | 120.32 | 167.89 | 151.97 | |
| Operating Cash Flow Growth | 47.24% | 55.91% | 5.58% | -28.33% | 10.48% | 11.65% | |
| Capital Expenditures | -1.92 | -2.17 | -0.14 | -0.41 | -0.47 | -1.24 | |
| Investment in Securities | -39.52 | -175.43 | 91.05 | -113.91 | 136.6 | -118.03 | |
| Investing Cash Flow | -41.44 | -177.6 | 90.91 | -114.33 | 136.13 | -119.26 | |
| Issuance of Common Stock | 20.66 | 9.62 | 5.81 | 4.38 | 16.23 | 23.23 | |
| Repurchase of Common Stock | -189.05 | -37.97 | -154.53 | -21.67 | -318.82 | -11.01 | |
| Financing Cash Flow | -168.39 | -28.35 | -148.72 | -17.28 | -302.59 | 12.21 | |
| Net Cash Flow | -25.84 | -7.89 | 69.22 | -11.29 | 1.43 | 44.92 | |
| Free Cash Flow | 180.27 | 195.9 | 126.9 | 119.91 | 167.42 | 150.73 | |
| Free Cash Flow Growth | 46.22% | 54.37% | 5.83% | -28.38% | 11.07% | 11.63% | |
| Free Cash Flow Margin | 25.17% | 29.02% | 26.31% | 29.84% | 45.75% | 42.59% | |
| Free Cash Flow Per Share | 1.52 | 1.73 | 1.14 | 1.03 | 1.33 | 1.21 | |
| Cash Income Tax Paid | 60.27 | 60.27 | 47.6 | 39.75 | 9.1 | 10.86 | |
| Levered Free Cash Flow | 166.88 | 183.85 | 128.39 | 115.55 | 120.18 | 116.42 | |
| Unlevered Free Cash Flow | 166.88 | 183.85 | 128.39 | 115.55 | 120.18 | 116.42 | |
| Change in Working Capital | 31.49 | 45.3 | 8.22 | 5.54 | -0.47 | -5.36 | |