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Business Segments (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Segment Reporting Information [Line Items] |  |
Net revenues: | $ 1,528.6 | $ 1,350.7
Percent change in net revenues | 13.20% |
Gross profit: | $ 993.8 | 856.8
Percent change in gross profit | 16.00% |
Operating profit | $ 451.6 | 393.6
Percent change in operating profit | 14.70% |
Long-lived assets: | $ 226.4 | 193.7
Percent change in long-lived assets | 16.90% |
Corporate |  |
Segment Reporting Information [Line Items] |  |
Unallocated corporate general and administrative expenses | $ 51.1 | 44.4
Application Software |  |
Segment Reporting Information [Line Items] |  |
Net revenues: | $ 576.6 | 405.1
Percent change in net revenues | 42.30% |
Gross profit: | $ 398.7 | 270.4
Percent change in gross profit | 47.40% |
Operating profit | $ 153.7 | 97.6
Percent change in operating profit | 57.50% |
Long-lived assets: | $ 126.7 | 85.1
Percent change in long-lived assets | 48.90% |
Network Software & Systems |  |
Segment Reporting Information [Line Items] |  |
Net revenues: | $ 440.2 | 438.2
Percent change in net revenues | 0.50% |
Gross profit: | $ 299.4 | 293.2
Percent change in gross profit | 2.10% |
Operating profit | $ 135.5 | 138.7
Percent change in operating profit | (2.30%) |
Long-lived assets: | $ 44.8 | 48.5
Percent change in long-lived assets | (7.60%) |
Measurement & Analytical Solutions |  |
Segment Reporting Information [Line Items] |  |
Net revenues: | $ 381.0 | 365.2
Percent change in net revenues | 4.30% |
Gross profit: | $ 224.7 | 214.6
Percent change in gross profit | 4.70% |
Operating profit | $ 124.1 | 114.0
Percent change in operating profit | 8.90% |
Long-lived assets: | $ 35.4 | 39.1
Percent change in long-lived assets | (9.50%) |
Process Technologies |  |
Segment Reporting Information [Line Items] |  |
Net revenues: | $ 130.8 | 142.2
Percent change in net revenues | (8.00%) |
Gross profit: | $ 71.0 | 78.6
Percent change in gross profit | (9.70%) |
Operating profit | $ 38.3 | 43.3
Percent change in operating profit | (11.50%) |
Long-lived assets: | $ 19.5 | $ 21.0
Percent change in long-lived assets | (7.10%) |

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