The interest rate on borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The maturity of borrowings. [Refer: Borrowings]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Loans and Other Borrowings - Summary of Loans and Other Borrowings (Parenthetical) (Detail) € in Millions, £ in Millions	12 Months Ended
	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 EUR (€)	Dec. 31, 2021 GBP (£)	Dec. 31, 2021 EUR (€)
GBP173m 3.875% bonds 2022 [member]
Disclosure of detailed information about borrowings [line items]
Notional amount	£ 173		£ 173
Bond interest rate	3.875%	3.875%	3.875%	3.875%
Maturity date	28 November 2022
EUR500m 1.625% bonds 2024 [member]
Disclosure of detailed information about borrowings [line items]
Notional amount \| €		€ 500		€ 500
Bond interest rate	1.625%	1.625%	1.625%	1.625%
Maturity date	8 October 2024
GBP300m 3.75% bonds 2025 [member]
Disclosure of detailed information about borrowings [line items]
Notional amount	£ 300		£ 300
Bond interest rate	3.75%	3.75%	3.75%	3.75%
Maturity date	14 August 2025
GBP350m 2.125% bonds 2026 [member]
Disclosure of detailed information about borrowings [line items]
Notional amount	£ 350		£ 350
Bond interest rate	2.125%	2.125%	2.125%	2.125%
Maturity date	24 August 2026
EUR500m 2.125% bonds 2027 [member]
Disclosure of detailed information about borrowings [line items]
Notional amount \| €		€ 500		€ 500
Bond interest rate	2.125%	2.125%	2.125%	2.125%
Maturity date	15 May 2027
GBP400m 3.375% bonds 2028 [member]
Disclosure of detailed information about borrowings [line items]
Notional amount	£ 400		£ 400
Bond interest rate	3.375%	3.375%	3.375%	3.375%
Maturity date	8 October 2028