Investments in Joint Ventures and Associates - Additional Information (Detail) - GBP (£) £ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investments in associates and joint ventures [line items]
Percentage of voting equity interests acquired		40.00%
Investments in associates reported in separate financial statements	£ 25	£ 24
Contingent consideration recognised as of acquisition date	5	7
Academy of Pop [Member]
Investments in associates and joint ventures [line items]
Investments in associates reported in separate financial statements	£ 9	£ 10

The amount, at acquisition date, of contingent consideration arrangements recognised as consideration transferred in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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- Definition

The amount of investments in associates in an entity's separate financial statements. [Refer: Associates [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

+ References

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- Definition

Investments in associates and joint ventures.

+ References

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