Discontinued Operations and Restructuring - Additional Disclosures (Details) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Jun. 30, 2013 Store	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of store closings			107
Total revenues | $	$ 0.3	$ 9.2		$ 1.6	$ 18.1
Mexico [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of store closings			57
Canada [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of store closings			29
United States [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of store closings			21