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Debt Debt (Details) (USD $)
In Thousands, unless otherwise specified
 6 Months Ended
Dec. 31, 2014
Debt Instrument [Line Items]  
Debt Issuance Cost $ 12,300us-gaap_DebtIssuanceCosts
Ten-Year Medium Term Notes  
Debt Instrument [Line Items]  
Long-term Debt Issued 500,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= ph_TenYearMediumTermNotesMember
Debt Instrument Maturity Period 2024-11
Interest Rate 3.30%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ph_TenYearMediumTermNotesMember
Twenty-Year Medium Term Notes  
Debt Instrument [Line Items]  
Long-term Debt Issued 500,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= ph_TwentyYearMediumTermNotesMember
Debt Instrument Maturity Period 2034-11
Interest Rate 4.20%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ph_TwentyYearMediumTermNotesMember
Thirty-Year Medium Term Notes  
Debt Instrument [Line Items]  
Long-term Debt Issued $ 500,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_DebtInstrumentAxis
= ph_ThirtyYearMediumTermNotesMember
Debt Instrument Maturity Period 2044-11
Interest Rate 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= ph_ThirtyYearMediumTermNotesMember