Impairment and Restructuring - Summary of Other Restructuring Charges (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	$ 40.2	$ 3.6	$ 42.5
Employee Severance [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	8.8
Other Restructuring [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	6.8
Business Realignment [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	15.6
North America [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	12.1
North America [Member] | Employee Severance [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	6.0
North America [Member] | Other Restructuring [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	6.1
International [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	3.5
International [Member] | Employee Severance [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	2.8
International [Member] | Other Restructuring [Member]
Segment Reporting Information [Line Items]
Restructuring Costs and Asset Impairment Charges	$ 0.7