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Taxation - Summary of Reconciliation of Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of average effective tax rate and applicable tax rate [abstract]
Computed rate of tax (in percent)	24.00%	23.00%	24.00%
Incentive tax credits (in percent)	(2.00%)	(2.00%)	(2.00%)
Withholding tax on dividends (in percent)	2.00%	2.00%	3.00%
Expenses not deductible for tax purposes (in percent)	1.00%	1.00%	1.00%
Irrecoverable witholding tax (in percent)	1.00%	1.00%	1.00%
Income tax reserve adjustments - current and prior year (in percent)	(1.00%)	(1.00%)	0.00%
Transfer to/(from) unrecognised deferred tax assets (in percent)	0.00%	0.00%	(2.00%)
Others (in percent)	(2.00%)	(1.00%)	1.00%
Underlying effective tax rate (in percent)	23.00%	23.00%	26.00%
Taxes related to the UK tax audit of intangible income and centralised services (in percent)	0.00%	1.00%	0.00%
Taxes related to the reorganisation of our European business (in percent)	(1.00%)	1.00%	2.00%
Hyperinflationary adjustment for Argentina deferred tax	1.00%	0.00%	0.00%
Effective tax rate (in percent)	23.00%	25.00%	28.00%

X

- Definition

The applicable income tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_c_ii&doctype=Standard
-URIDate 2021-03-24

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X

- Definition

The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_c_ii&doctype=Standard
-URIDate 2021-03-24

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- References

No definition available.

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X

- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from the expenses not deductible in determining taxable profit. [Refer: Average effective tax rate; Applicable tax rate]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_c_ii&doctype=Standard
-URIDate 2021-03-24

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- Definition

Hyperinflationary Adjustment For Deferred Tax, Percentage

+ References

No definition available.

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X

- Definition

Tax rate effect impact of business restructuring

+ References

No definition available.

+ Details

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X

- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from incentive tax credit.

+ References

No definition available.

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X

- Definition

Tax rate effect of income tax reserve adjustments current and prior periods.

+ References

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- Definition

Tax rate effect of intangible income and centralised services.

+ References

No definition available.

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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from irrecoverable withholding tax.

+ References

No definition available.

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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from transfer to/(from) unrecognised deferred tax assets.

+ References

No definition available.

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- Definition

The tax rate effect on the reconciliation between the average effective tax rate and the applicable tax rate resulting from withholding tax on dividends.

+ References

No definition available.

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- Definition

Tax rate effect others.

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No definition available.

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- Definition

Underlying effective tax rate.

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