| Submission | Nov. 13, 2024 |
| Submission [Line Items] | |
| Central Index Key | 0000719245 |
| Registrant Name | WESTPAC BANKING CORP |
| Registration File Number | 333-283008 |
| Form Type | F-3 |
| Submission Type | 424B5 |
| Fee Exhibit Type | EX-FILING FEES |
| Offerings | Nov. 13, 2024 USD ($) |
| Offering: 1 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Debt |
| Security Class Title | Subordinated Debt Securities |
| Maximum Aggregate Offering Price | $ 1,500,000,000 |
| Fee Rate | 0.01531% |
| Amount of Registration Fee | $ 229,650 |
| Offering Note | (1) The registration fee is calculated in accordance with Rules 457(o) and 457(r) under the Securities Act of 1933, as amended (the "Securities Act"). This "Calculation of Filing Fee Tables" table shall be deemed to update the "Calculation of Filing Fee Tables" table in the registrants' Registration Statement on Form F-3 (No. 333-283008), in accordance with Rules 456(b) and 457(r) under the Securities Act |
| Offering: 2 | |
| Offering: | |
| Fee Previously Paid | false |
| Rule 457(r) | true |
| Security Type | Equity |
| Security Class Title | Ordinary Shares |
| Fee Rate | 0.01531% |
| Offering Note | (1) Represents an indeterminate number of fully paid ordinary shares in the capital of the registrant, which we refer to as the Ordinary Shares, that may be issued from time to time upon conversion of the 5.618% Subordinated Notes due 2035. (2) Pursuant to Rule 457(i) under the Securities Act, no separate registration fee is required for the Ordinary Shares underlying the notes because no additional consideration is to be received in connection with the exercise of the conversion privilege |
| Fees Summary | Nov. 13, 2024 USD ($) |
| Fees Summary [Line Items] | |
| Total Offering | $ 1,500,000,000 |
| Previously Paid Amount | 0 |
| Total Fee Amount | 229,650 |
| Total Offset Amount | 0 |
| Net Fee | $ 229,650 |
| Final Prospectus | false |
