Description of Business and Significant Accounting Policies - Change in Accounting Estimate (Details) - Change in self-insurance reserve $ in Millions	3 Months Ended
	Sep. 30, 2014 USD ($)
Change in Accounting Estimate [Line Items]
Self-insurance claims reserve adjustment	$ 37.4
Minimum
Change in Accounting Estimate [Line Items]
Estimated self-insurance claim close-out period	15 years
Maximum
Change in Accounting Estimate [Line Items]
Estimated self-insurance claim close-out period	17 years