Property, plant and equipment - Summary of Property Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	$ 198,642
At December 31	194,835	$ 198,642
Cost
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	434,961	436,769
Additions	25,831	28,254
Sales, retirements and other movements	(8,720)	(19,800)
Reclassifications	0
Currency translation differences	(2,998)	10,262
At December 31	455,070	434,961
Depreciation, depletion and amortisation, including impairments
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	(236,319)	(241,837)
Charge for the year	29,915	17,310
Sales, retirements and other movements	8,086	16,422
Reclassifications	0
Currency translation differences	2,087	(6,406)
At December 31	(260,235)	(236,319)
Carrying amount of exploration and evaluation assets
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	6,403	7,000
At December 31	5,312	6,403
Carrying amount of exploration and evaluation assets \| Cost
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	11,565	12,679
Additions	2,161	1,564
Sales, retirements and other movements	(5,164)	(2,469)
Reclassifications	0
Currency translation differences	(73)	209
At December 31	8,635	11,565
Carrying amount of exploration and evaluation assets \| Depreciation, depletion and amortisation, including impairments
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	(5,162)	(5,580)
Charge for the year	731	397
Sales, retirements and other movements	2,609	765
Reclassifications	0
Currency translation differences	39	(50)
At December 31	(3,323)	(5,162)
Production
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	117,354
At December 31	110,697	117,354
Production \| Cost
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	277,016	285,903
Additions	10,731	11,954
Sales, retirements and other movements	(1,153)	(14,541)
Reclassifications	(2,779)
Currency translation differences	(1,855)	6,300
At December 31	285,670	277,016
Production \| Depreciation, depletion and amortisation, including impairments
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	(159,662)	(167,530)
Charge for the year	18,202	9,709
Sales, retirements and other movements	2,000	13,207
Reclassifications	2,217
Currency translation differences	1,326	(4,370)
At December 31	(174,973)	(159,662)
Manufacturing, supply and distribution
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	49,884
At December 31	49,243	49,884
Manufacturing, supply and distribution \| Cost
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	106,785	104,182
Additions	5,910	6,928
Sales, retirements and other movements	(1,016)	(2,548)
Reclassifications	527
Currency translation differences	(863)	1,777
At December 31	113,069	106,785
Manufacturing, supply and distribution \| Depreciation, depletion and amortisation, including impairments
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	(56,901)	(55,131)
Charge for the year	8,295	5,149
Sales, retirements and other movements	2,083	2,054
Reclassifications	(63)
Currency translation differences	650	(1,325)
At December 31	(63,826)	(56,901)
Other PPE
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	25,001
At December 31	29,583	25,001
Other PPE \| Cost
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	39,595	34,005
Additions	7,029	7,808
Sales, retirements and other movements	(1,387)	(242)
Reclassifications	2,252
Currency translation differences	(207)	1,976
At December 31	47,696	39,595
Other PPE \| Depreciation, depletion and amortisation, including impairments
Reconciliation of changes in property, plant and equipment [abstract]
At January 1	(14,594)	(13,596)
Charge for the year	2,687	2,055
Sales, retirements and other movements	1,394	396
Reclassifications	(2,154)
Currency translation differences	72	(661)
At December 31	$ (18,113)	$ (14,594)

The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 73
-Subparagraph e
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_i&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The decrease in property, plant and equipment resulting from disposals and retirements. [Refer: Property, plant and equipment]

+ References

+ Details

Name:	ifrs-full_DisposalsAndRetirementsPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The increase (decrease) in property, plant and equipment resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 73
-Subparagraph e
-Clause viii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e_viii&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The increase (decrease) in property, plant and equipment resulting from transfers. [Refer: Property, plant and equipment]

+ References

+ Details

Name:	ifrs-full_IncreaseDecreaseThroughTransfersPropertyPlantAndEquipment
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 73
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_a&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_PropertyPlantAndEquipmentIncludingRightofuseAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

Name:	ifrs-full_ReconciliationOfChangesInPropertyPlantAndEquipmentAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Depreciation And Impairment Loss Recognised In Profit Or Loss, Property, Plant And Equipment

+ References

No definition available.

+ Details

Name:	shel_DepreciationAndImpairmentLossRecognisedInProfitOrLossPropertyPlantAndEquipment
Namespace Prefix:	shel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_GrossCarryingAmountMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis=ifrs-full_AccumulatedDepreciationAmortisationAndImpairmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ExplorationAndEvaluationAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=shel_ProductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=shel_ManufacturingSupplyAndDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OtherPropertyPlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: