Background Information (Details)	Sep. 30, 2020 Banks
Nature of Operations [Line Items]
Number of Federal Home Loan Banks	11
Minimum
Nature of Operations [Line Items]
Related Party Transaction, Definition Of Related Party, Capital Stock, Percent	10.00%

Related Party Transaction, Definition Of Related Party, Capital Stock, Percent

No definition available.

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Namespace Prefix:	fhlbpgh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant