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] | ||
| Interest paid, classified as operating activities |
6,043,000,000
GBP
|
1,412,000,000
GBP
|
| Interest received, classified as operating activities |
14,320,000,000
GBP
|
9,167,000,000
GBP
|
| Income taxes paid (refund), classified as operating activities |
780,000,000
GBP
|
1,161,000,000
GBP
|
| Cash flows from (used in) operating activities |
4,794,000,000
GBP
|
39,743,000,000
GBP
|
| Cash flows from (used in) investing activities [abstract] | ||
| Proceeds from sales of property, plant and equipment, classified as investing activities |
92,000,000
GBP
|
138,000,000
GBP
|
| Purchase of property, plant and equipment, classified as investing activities |
787,000,000
GBP
|
618,000,000
GBP
|
| Dividends received, classified as investing activities |
-
GBP
|
-
GBP
|
| Cash flows from (used in) investing activities |
17,805,000,000
GBP
|
11,232,000,000
GBP
|
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from issuing other equity instruments |
-
GBP
|
500,000,000
GBP
|
| Dividends paid, classified as financing activities |
1,885,000,000
GBP
|
3,418,000,000
GBP
|
| Cash flows from (used in) financing activities |
1,315,000,000
GBP
|
2,958,000,000
GBP
|
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||
| Effect of exchange rate changes on cash and cash equivalents |
403,000,000
GBP
|
1,142,000,000
GBP
|
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes |
24,317,000,000
GBP
|
30,327,000,000
GBP
|