Summary of Significant Accounting Policies - Goodwill and Other Intangible Assets (Details) - Goodwill and Indefinite-lived Intangible Assets [Member] - Income Approach Valuation Technique [Member]	12 Months Ended
	Sep. 30, 2015
Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates used for reporting unit valuations	16.00%
Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rates used for reporting unit valuations	25.00%