Dividends (Details) £ / shares in Units, £ in Millions	6 Months Ended
Jun. 30, 2021 GBP (£) £ / shares
Dividends
Interim dividend announced \| £	£ 347
Interim dividend per share \| £ / shares	£ 0.03

The amount of interim dividend announced per ordinary share.

No definition available.

Name:	nwg_InterimDividendAnnouncedOrdinarySharesPerShare
Namespace Prefix:	nwg_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration