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.

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Acquisitions - Narrative (Details) - USD ($) $ in Thousands			3 Months Ended
Acquisitions - Narrative (Details) - USD ($) $ in Thousands	Oct. 29, 2019	Sep. 16, 2019	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Acquisition-related transaction costs			$ 14,930
EMFCO Holdings Incorporated
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Equity interest		100.00%
Purchase price to acquire business		$ 1,706,000
Aggregate annual sales for businesses acquired for their most recent fiscal year prior to acquisition			409,000
LORD Corporation
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Pro forma net sales			$ 3,581,000	$ 3,737,000
Customer Relationships \| EMFCO Holdings Incorporated
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Intangible assets acquired		$ 548,860
Weighted average useful life of intangible assets		19 years
Patents and Technology \| EMFCO Holdings Incorporated
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Intangible assets acquired		$ 337,600
Weighted average useful life of intangible assets		20 years
Trademarks \| EMFCO Holdings Incorporated
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Intangible assets acquired		$ 90,600
Weighted average useful life of intangible assets		20 years
Subsequent Event \| LORD Corporation
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Equity interest	100.00%
Purchase price to acquire business	$ 3,453,000
Aggregate annual sales for businesses acquired for their most recent fiscal year prior to acquisition	$ 1,025,000
Diversified Industrial Segment \| Revenue, Segment Benchmark \| Subsequent Event \| LORD Corporation
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Concentration risk	95.00%
Aerospace Systems Segment \| Revenue, Segment Benchmark \| Subsequent Event \| LORD Corporation
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Concentration risk	5.00%