Statement Of Cash Flows [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|
| Statement of cash flows [abstract] | |||
| Cash flows from (used in) operating activities [abstract] | |||
| Increase (decrease) in working capital |
3,172,000,000
GBP
|
37,515,000,000
GBP
|
9,602,000,000
GBP
|
| Adjustments for decrease (increase) in other assets |
5,707,000,000
GBP
|
7,359,000,000
GBP
|
10,924,000,000
GBP
|
| Adjustments for increase (decrease) in other liabilities |
7,506,000,000
GBP
|
21,393,000,000
GBP
|
12,295,000,000
GBP
|
| Adjustments for increase (decrease) in repurchase agreements and cash collateral on securities lent |
20,516,000,000
GBP
|
5,641,000,000
GBP
|
7,643,000,000
GBP
|
| Adjustments for decrease (increase) in reverse repurchase agreements and cash collateral on securities borrowed |
13,531,000,000
GBP
|
6,251,000,000
GBP
|
9,538,000,000
GBP
|
| Adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss |
61,000,000
GBP
|
128,000,000
GBP
|
174,000,000
GBP
|
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, loans and advances |
161,000,000
GBP
|
253,000,000
GBP
|
171,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | |||
| Purchase of financial instruments, classified as investing activities |
26,586,000,000
GBP
|
13,227,000,000
GBP
|
18,890,000,000
GBP
|
| Proceeds from sales or maturity of financial instruments, classified as investing activities |
15,497,000,000
GBP
|
20,490,000,000
GBP
|
25,027,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | |||
| Dividends paid to equity holders of parent, classified as financing activities |
961,000,000
GBP
|
1,052,000,000
GBP
|
194,000,000
GBP
|
| Dividends paid to non-controlling interests, classified as financing activities |
7,000,000
GBP
|
2,000,000
GBP
|
1,000,000
GBP
|
| Cash advances and loans from related parties |
—
GBP
|
1,465,000,000
GBP
|
—
GBP
|
| Proceeds from issue of subordinated liabilities |
3,246,000,000
GBP
|
3,111,000,000
GBP
|
10,466,000,000
GBP
|
| Repayments of subordinated liabilities |
2,693,000,000
GBP
|
2,248,000,000
GBP
|
10,902,000,000
GBP
|