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Business Combinations - Air-X-Changers Narratives (Details) - USD ($) $ in Millions		3 Months Ended
	Jul. 01, 2019	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2019
Business Acquisition
Payment for acquisition of businesses, net of cash acquired		$ 0.0		$ 2.8
AXC
Business Acquisition
Payment for acquisition of businesses, net of cash acquired	$ 599.7
Payments for acquisition of business excluding working capital adjustments			$ 592.0
Payment for working capital adjustments			$ 7.7
AXC | Minimum
Business Acquisition
Finite lived intangible assets useful life	1 year
AXC | Maximum
Business Acquisition
Finite lived intangible assets useful life	14 years

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- Definition

Business Acquisition, Working Capital Adjustments Payments

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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