| | 2008 | 2007 | 2006 | 2005 | 2004 |
| Period End Date | 12/31/2008 | 12/31/2007 | 12/31/2006 | 12/31/2005 | 12/31/2004 |
| Period Length | 12 Months | 12 Months | 12 Months | 12 Months | 12 Months |
| Stmt Source | 10-K | 10-K | 10-K | 10-K | 10-K |
| Stmt Source Date | 02/13/2009 | 02/15/2008 | 02/16/2007 | 02/21/2006 | 02/25/2005 |
| Stmt Update Type | Updated | Updated | Updated | Updated | Updated |
| | | | | | |
| Revenue | 1,973.34 | 1,793.75 | 1,594.91 | 1,482.47 | 1,404.45 |
| Total Revenue | 1,973.34 | 1,793.75 | 1,594.91 | 1,482.47 | 1,404.45 |
| | | | | | |
| Cost of Revenue, Total | 980.26 | 897.57 | 804.48 | 752.15 | 722.05 |
| Gross Profit | 993.08 | 896.18 | 790.43 | 730.32 | 682.41 |
| | | | | | |
| Selling/General/Administrative Expenses, Total | 579.81 | 529.13 | 481.71 | 441.7 | 419.78 |
| Research & Development | 102.28 | 92.38 | 82.8 | 81.89 | 83.22 |
| Depreciation/Amortization | 10.55 | 11.68 | 11.5 | 11.44 | 12.26 |
| Interest Expense (Income), Net Operating | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Unusual Expense (Income) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other Operating Expenses, Total | 8.98 | -0.88 | -7.92 | 20.22 | 0.04 |
| Operating Income | 266.07 | 242.87 | 204.85 | 160.18 | 154.22 |
| | | | | | |
| Interest Income (Expense), Net Non-Operating | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Gain (Loss) on Sale of Assets | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other, Net | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Income Before Tax | 266.07 | 242.87 | 204.85 | 160.18 | 154.22 |
| | | | | | |
| Income Tax - Total | 63.29 | 64.36 | 47.32 | 51.28 | 46.27 |
| Income After Tax | 202.78 | 178.51 | 157.53 | 108.9 | 107.96 |
| | | | | | |
| Minority Interest | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Equity In Affiliates | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| U.S. GAAP Adjustment | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net Income Before Extra. Items | 202.78 | 178.51 | 157.53 | 108.9 | 107.96 |
| | | | | | |
| Total Extraordinary Items | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net Income | 202.78 | 178.51 | 157.53 | 108.9 | 107.96 |
| | | | | | |
| | | | | | |
Total Adjustments to Net Income | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Preferred Dividends | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | | General Partners' Distributions | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
|
| | | | | | |
| Basic Weighted Average Shares | 34.25 | 37.03 | 40.07 | 42.21 | 44.24 |
| Basic EPS Excluding Extraordinary Items | 5.92 | 4.82 | 3.93 | 2.58 | 2.44 |
| Basic EPS Including Extraordinary Items | 5.92 | 4.82 | 3.93 | 2.58 | 2.44 |
| | | | | | |
| Diluted Weighted Average Shares | 35.05 | 37.95 | 40.79 | 43.29 | 45.48 |
| Diluted EPS Excluding Extrordinary Items | 5.79 | 4.7 | 3.86 | 2.52 | 2.37 |
| Diluted EPS Including Extraordinary Items | 5.79 | 4.7 | 3.86 | 2.52 | 2.37 |
| | | | | | |
| Dividends per Share - Common Stock Primary Issue | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Gross Dividends - Common Stock | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Interest Expense, Supplemental | 25.39 | 21.0 | 17.49 | 14.88 | 12.89 |
| Depreciation, Supplemental | 28.99 | 26.66 | 26.07 | 25.98 | 26.67 |
| | | | | | |
| Normalized EBITDA | 331.0 | 302.22 | 259.91 | 212.48 | 206.04 |
| Normalized EBIT | 291.46 | 263.87 | 222.34 | 175.06 | 167.11 |
| Normalized Income Before Tax | 266.07 | 242.87 | 204.85 | 160.18 | 154.22 |
| Normalized Income After Taxes | 202.78 | 178.51 | 157.53 | 108.9 | 107.96 |
| Normalized Income Available to Common | 202.78 | 178.51 | 157.53 | 108.9 | 107.96 |
| | | | | | |
| Basic Normalized EPS | 5.92 | 4.82 | 3.93 | 2.58 | 2.44 |
| Diluted Normalized EPS | 5.79 | 4.7 | 3.86 | 2.52 | 2.37 |
| Amortization of Intangibles | 10.55 | 11.68 | 11.5 | 11.44 | 12.26 |