Impairment charges relating to non-cash write-downs of long-lived assets and working capital

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Transaction related costs for businesses to be disposed of

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Amount of gain (loss) on sale or disposal of other assets.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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

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

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Aggregate cash proceeds received from a combination of transactions in which noncurrent assets are sold, which may include the sale of a business, an investment in an affiliate (including an equity method investee), property, plant and equipment and intangible assets. Excludes sales of trading, available-for-sale, and held-to-maturity securities.

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A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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The amount the entity has committed to make for future royalty guarantees.

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Acquisitions (Narrative) (Details) - USD ($) $ in Millions				12 Months Ended
Acquisitions (Narrative) (Details) - USD ($) $ in Millions	Sep. 03, 2019	Apr. 01, 2019	Feb. 14, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Feb. 28, 2017
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Net Income (Loss)				$ 161.6	$ 208.6
Proceeds from Sales of Business, Affiliate and Productive Assets				166.6	1.0	$ 5.8
Gain (Loss) on Disposition of Other Assets				(15.9)	(23.0)	1.0
Cash payment, net of cash acquired				303.4	0.0	311.4
Goodwill				1,800.9	$ 1,738.3	1,759.6
Royalty Guarantees, Commitments, Amount				22.0
Senior unsecured 5.00% Notes due on February 14, 2025 [Member]
Business Acquisition [Line Items]
Senior unsecured notes							$ 300.0
Breathe [Member]
Business Acquisition [Line Items]
Cash payment, net of cash acquired	$ 127.6
Goodwill	60.2
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$ 127.6
Voalte [Member]
Business Acquisition [Line Items]
Professional Fees				12.1
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability				3.2
Cash consideration		$ 175.8
Goodwill		98.4
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net		181.0
Business Combination, Contingent Consideration, Liability		5.2
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High		$ 15.0
Mortara [Member]
Business Acquisition [Line Items]
Cash consideration			$ 330.0
Cash payment, net of cash acquired			311.2
Goodwill			165.5
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net			$ 311.2
Architectural Products Business [Member]
Business Acquisition [Line Items]
Proceeds from Sales of Business, Affiliate and Productive Assets						4.5
Volker [Member]
Business Acquisition [Line Items]
Gain (Loss) on Disposition of Business				1.0
Impairment charges relating to non-cash write-downs of long-lived assets and working capital						25.4
Transaction related costs for businesses to be disposed of						$ 3.0
Selling, General and Administrative Expenses [Member] \| Breathe [Member]
Business Acquisition [Line Items]
Professional Fees				6.4
Restructuring Charges [Member] \| Breathe [Member]
Business Acquisition [Line Items]
Professional Fees				$ 1.7