Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments to reconcile profit (loss) other than changes in working capital |
1,329,000,000
GBP
|
1,574,000,000
GBP
|
| Increase (decrease) in working capital |
10,132,000,000
GBP
|
45,270,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Purchase of financial instruments, classified as investing activities |
35,090,000,000
GBP
|
13,388,000,000
GBP
|
| Proceeds from sales or maturity of financial instruments, classified as investing activities |
18,254,000,000
GBP
|
25,721,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from issue of subordinated liabilities |
1,263,000,000
GBP
|
-
GBP
|
| Repayments of subordinated liabilities |
539,000,000
GBP
|
55,000,000
GBP
|