Disclosure Of Fair Value Measurement [Text Block]
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As at 2022-09-30 |
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| Disclosure of fair value measurement [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of assets [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of assets [line items] | |||||||||||||||||||||
| Assets |
19,270,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
18,420,200,000
GBP
|
— | — | — |
16,653,600,000
GBP
|
— | — | — | — |
| Reconciliation of changes in fair value measurement, assets [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of liabilities [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of liabilities [line items] | |||||||||||||||||||||
| Liabilities |
17,850,500,000
GBP
|
— | — | — | — | — | — | — | — | — | — | — |
17,009,600,000
GBP
|
— | — | — |
15,236,300,000
GBP
|
— | — | — | — |
| Reconciliation of changes in fair value measurement, liabilities [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of equity [text block] | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Disclosure of fair value measurement of equity [abstract] | |||||||||||||||||||||
| Disclosure of fair value measurement of equity [line items] | |||||||||||||||||||||
| Equity |
1,419,500,000
GBP
|
70,200,000
GBP
|
210,600,000
GBP
|
71,400,000
GBP
|
1,242,100,000
GBP
|
65,400,000
GBP
|
31,000,000
GBP
|
70,200,000
GBP
|
1,243,400,000
GBP
|
71,400,000
GBP
|
75,600,000
GBP
|
228,700,000
GBP
|
1,410,600,000
GBP
|
12,900,000
GBP
|
70,200,000
GBP
|
71,100,000
GBP
|
1,417,300,000
GBP
|
1,151,200,000
GBP
|
48,000,000
GBP
|
241,400,000
GBP
|
71,800,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |