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Leases - Summary of Future Minimum Payment Receivables (Detail) kr in Millions	Dec. 31, 2024 SEK (kr)
Disclosure of Financial Lease and Operating Lease by Lessor [Line Items]
Future minimum, Financial leases	kr 14
Future minimum, Operating leases	83
2025 [member]
Disclosure of Financial Lease and Operating Lease by Lessor [Line Items]
Future minimum, Financial leases	14
Future minimum, Operating leases	45
2026 [member]
Disclosure of Financial Lease and Operating Lease by Lessor [Line Items]
Future minimum, Financial leases	0
Future minimum, Operating leases	21
2027 [member]
Disclosure of Financial Lease and Operating Lease by Lessor [Line Items]
Future minimum, Financial leases	0
Future minimum, Operating leases	13
2028 [member]
Disclosure of Financial Lease and Operating Lease by Lessor [Line Items]
Future minimum, Financial leases	0
Future minimum, Operating leases	3
2029 [member]
Disclosure of Financial Lease and Operating Lease by Lessor [Line Items]
Future minimum, Financial leases	0
Future minimum, Operating leases	kr 1

X

- Definition

Disclosure of financial lease and operating lease by lessor.

+ References

No definition available.

+ Details

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Namespace Prefix:	eric_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of undiscounted finance lease payments to be received. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 94
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_94&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- Definition

The amount of undiscounted operating lease payments to be received. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 97
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_97&doctype=Standard
-URIDate 2024-03-27

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
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X

- Details

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X

- Details

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