Goodwill and Other Intangible Assets Goodwill Rollforward (Details) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Goodwill [Roll Forward] | ||
| Goodwill, beginning of period | $ 3,979.0 | $ 3,949.0 |
| Goodwill attributable to acquisitions | 1,035.2 | 113.2 |
| Foreign currency translation & other | 84.3 | (83.2) |
| Goodwill, end of period | 5,098.5 | 3,979.0 |
| Professional Instrumentation [Member] | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning of period | 2,423.7 | 2,400.6 |
| Goodwill attributable to acquisitions | 851.8 | 61.3 |
| Foreign currency translation & other | 55.5 | (38.2) |
| Goodwill, end of period | 3,331.0 | 2,423.7 |
| Industrial Technologies [Member] | ||
| Goodwill [Roll Forward] | ||
| Goodwill, beginning of period | 1,555.3 | 1,548.4 |
| Goodwill attributable to acquisitions | 183.4 | 51.9 |
| Foreign currency translation & other | 28.8 | (45.0) |
| Goodwill, end of period | $ 1,767.5 | $ 1,555.3 |