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Commitments and Contingencies Commitment and contingencies (additional information) (Details)
 6 Months Ended
Dec. 31, 2014
taxable_jurisdiction
Loss Contingencies [Line Items]  
Number of Taxable Jurisdictions 140pg_NumberofTaxableJurisdictions
Minimum [Member]  
Loss Contingencies [Line Items]  
Number of Audits Typically Underway 50pg_NumberofAuditsTypicallyUnderway
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]  
Loss Contingencies [Line Items]  
Number of Audits Typically Underway 60pg_NumberofAuditsTypicallyUnderway
/ us-gaap_RangeAxis
= us-gaap_MaximumMember