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Business Acquisitions and Assets and Liabilities Held for Sale (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2018 USD ($) | Sep. 30, 2018 USD ($) acquisition | Jul. 10, 2018 | Jun. 07, 2018 | Jun. 04, 2018 | Dec. 31, 2017 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |
Number of businesses acquired | acquisition |  | 6 |  |  |  |
Cost of acquired entity purchase price |  | $ 1,188.3 |  |  |  |
Goodwill acquired |  | 663.6 |  |  |  |
Other identifiable intangibles added |  | 660.7 |  |  |  |
Deferred taxes |  | 958.2 |  |  |  | $ 829.6
Held-for-sale | Gatan, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Deferred taxes | $ 10.0 |  |  |  |  |
Thermo Fisher | Held-for-sale | Gatan, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cost of acquired entity purchase price | $ 925.0 |  |  |  |  |
Percentage of shares agreed to be sold | 100.00% |  |  |  |  |
Customer related intangibles |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets other than goodwill |  | $ 589.7 |  |  |  |
Weighted average useful life |  | 19 years |  |  |  |
Technology |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets other than goodwill |  | $ 44.1 |  |  |  |
Weighted average useful life |  | 8 years |  |  |  |
PowerPlan, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of shares acquired |  |  |  |  | 100.00% |
ConceptShare, Inc. |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of shares acquired |  |  |  | 100.00% |  |
BillBlast |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of shares acquired |  |  | 100.00% |  |  |
Software Solutions, Cost Estimates Within Construction Industry |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Number of businesses acquired | acquisition |  | 3 |  |  |  |

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