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Accounting information and policies - Going Concern Narrative (Details) - Jun. 30, 2022 - European debt issuance programme € in Millions, £ in Millions	EUR (€)	GBP (£)
Euro
Schedule Of Going Concern [Line Items]
Notional amounts | €	€ 1,650
Sterling
Schedule Of Going Concern [Line Items]
Notional amounts | £		£ 900

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- Definition

Schedule Of Going Concern [Line Items]

+ References

No definition available.

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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2021-03-24

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