Superannuation 
                Staff may contribute to the Pension Scheme, a defined benefits pension scheme now closed to new members, or to the Gold
                    State Superannuation Scheme, a defined benefit lump sum scheme now also closed to new members. All staff who do not
                    contribute to either of these schemes become non-contributory members of the West State Superannuation Scheme. PTA
                    contributes to this accumulated fund in compliance with the Commonwealth Government’s Superannuation Guarantee
                    (Administration) Act 1992. All of these schemes are administered by the Government Employees Superannuation
                    Board (GESB). 
                The liability for superannuation charges incurred under the Pension Scheme, together with the pre-transfer service liability for
                    employees who transferred to the Gold State Superannuation Scheme has been assumed by the Treasurer. 
                The PTA is funded for employer contributions in respect of the Gold State Superannuation Scheme and the West State
                    Superannuation Scheme.These contributions were paid to the GESB during the year. The GESB subsequently paid the employer
                    contributions in respect of the Gold State Superannuation Scheme to the Consolidated Fund. 
                The liabilities for superannuation charges under the Gold State Superannuation Scheme and West State Superannuation Scheme
                    are extinguished by payment of employer contributions to the GESB. 
                Employee benefit on-costs 
                Employee benefit on-costs, including payroll tax, are recognised and included in employee benefit liabilities and costs when the
                    employee benefits to which they relate are recognised as liabilities and expenses (see notes 2 and 24). 
                r) Restoration costs 
                Restoration provisions arise where PTA has a present legal, equitable, or constructive obligation to undertake restoration works
                    in respect of any property controlled by the Authority. 
                A provision is recognised where a future sacrifice of economic benefits is probable and can be estimated reliably. The amount
                    recognised is the present value of the estimated future cash outflows required to complete the work. 
                s) Accrued salaries 
                Accrued salaries (refer to note 22) represent the amount due to staff but unpaid at the end of the financial year, as the end of
                    the last pay period for that financial year does not coincide with the end of the financial year. PTA considers the carrying amount
                    approximates net fair value. 
                t) Resources received free of charge or for nominal value 
                Resources received free of charge or for nominal value which can be reliably measured are recognised as revenues and as assets
                    or expenses as appropriate at fair value. 
                u) Foreign currency translation and hedges 
                Transactions denominated in a foreign currency are translated at the rates in existence at the dates of the transactions. Foreign
                    currency receivables and payables at reporting date are translated at exchange rates current at reporting date. Exchange gains
                    and losses are brought to account in determining the result for the year. 
                Forward foreign exchange contracts are entered into as hedges to avoid or minimise possible adverse financial effects of
                    movements in exchange rates. Exchange gains and losses and costs arising from these contracts are deferred and included in
                    the determination of the amounts at which the transactions are brought to account.                 v) Comparative figures 
                Comparative figures are, where appropriate, reclassified so as to be comparable with the figures presented in the current financial
                    year. 
                w) Rounding of amounts 
                Amounts in the financial statements have been rounded to the nearest thousand dollars.  |