Basis of Presentation and Accounting Policies - Intangible Assets (Narrative) (Details)	12 Months Ended
	Sep. 30, 2020
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	3 years
Minimum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	8 years
Minimum | Technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	2 years
Minimum | Other Intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	5 years
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	15 years
Maximum | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	20 years
Maximum | Technology
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	17 years
Maximum | Other Intangible assets
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	30 years