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Retirement benefit obligations - RIPS (Details) - UK RIPS - GBP (£) £ in Millions	1 Months Ended
	Dec. 31, 2022	Feb. 24, 2022
Disclosure of defined benefit plans
Insurance policy value		£ 1,159
Surplus refunded	£ 22

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- Definition

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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No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	na
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- Definition

Represents information pertaining to policy value.

+ References

No definition available.

+ Details

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Namespace Prefix:	rto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- Definition

Surplus refunded

+ References

No definition available.

+ Details

Name:	rto_SurplusRefunded
Namespace Prefix:	rto_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Details

Name:	ifrs-full_DefinedBenefitPlansAxis=rto_UkRentokilInitial2015PensionSchemeMember
Namespace Prefix:
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Balance Type:
Period Type: