XML 258 R146.htm IDEA: XBRL DOCUMENT v3.21.2
Equity - Monthly breakdown of shares purchased and the average price paid per share (Details) - Treasury shares purchased during the year - £ / shares
 1 Months Ended 12 Months Ended
Jun. 30, 2021
May 31, 2021
Jun. 30, 2021
Disclosure of classes of share capital [line items]      
Average price paid pence (in GBP per share) £ 34.53 £ 33.60 £ 34.11
Authorised purchases unutilised at month end (in shares) 229,487,001 231,335,953 229,487,001
Share buyback programme      
Disclosure of classes of share capital [line items]      
Number of shares purchased under share buyback programme (in shares) 1,848,952 1,484,935 3,333,887
Total number of shares purchased (in shares) 1,848,952 1,484,935 3,333,887