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Business Acquisitions and Divestitures (Details) $ in Thousands, CAD in Millions	Jun. 30, 2017 USD ($)	Jun. 21, 2017 USD ($)	Jun. 21, 2017 CAD	May 15, 2017 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Goodwill	$ 8,720,225				$ 8,647,142
Energy Systems And Controls [Member]
Business Acquisition [Line Items]
Goodwill	$ 433,878				$ 410,423
Proceeds from sale of other asset				$ 10,400
Pretax gain on sale of other asset				$ 9,400
Phase Technology [Member]
Business Acquisition [Line Items]
Cost of acquired entity purchase price		$ 32,900	CAD 44
Goodwill		19,200
Intangible assets other than goodwill		13,800
Phase Technology [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets other than goodwill		8,100
Weighted average useful life	9 years
Phase Technology [Member] | Technology [Member]
Business Acquisition [Line Items]
Intangible assets other than goodwill		$ 3,600
Weighted average useful life	6 years

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
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