Disclosure Of Fair Value Measurement [Text Block]
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| Disclosure of fair value measurement [text block] |
2.2. Fair value – financial instruments
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| 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 | — | — |
692,673,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
720,053,000,000
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 | — | — |
655,485,000,000
GBP
|
— | — | — | — | — | — | — | — | — | — |
683,557,000,000
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 | — |
10,844,000,000
GBP
|
37,188,000,000
GBP
|
2,004,000,000
GBP
|
10,645,000,000
GBP
|
31,000,000
GBP
|
841,000,000
GBP
|
10,881,000,000
GBP
|
37,157,000,000
GBP
|
1,899,000,000
GBP
|
49,000,000
GBP
|
3,890,000,000
GBP
|
11,700,000,000
GBP
|
36,496,000,000
GBP
|
8,000,000
GBP
|
10,019,000,000
GBP
|
1,478,000,000
GBP
|
10,881,000,000
GBP
|
36,488,000,000
GBP
|
102,000,000
GBP
|
3,890,000,000
GBP
|
2,771,000,000
GBP
|
1,393,000,000
GBP
|
12,629,000,000
GBP
|
12,966,000,000
GBP
|
3,890,000,000
GBP
|
41,803,000,000
GBP
|
395,000,000
GBP
|
269,000,000
GBP
|
10,881,000,000
GBP
|
41,796,000,000
GBP
|
7,000,000
GBP
|
1,205,000,000
GBP
|
351,000,000
GBP
|
24,000,000
GBP
|
12,567,000,000
GBP
|
36,000,000
GBP
|
13,240,000,000
GBP
|
229,000,000
GBP
|
4,999,000,000
GBP
|
43,860,000,000
GBP
|
10,881,000,000
GBP
|
1,608,000,000
GBP
|
43,824,000,000
GBP
|
360,000,000
GBP
|
| Reconciliation of changes in fair value measurement, entity's own equity instruments [abstract] |