Plan Participation - Additional Information (Detail) - EBP 006 [Member]	12 Months Ended
Dec. 31, 2025 Month	Dec. 31, 2024
EBP, Description of Plan [Line Items]
EBP, number of participants	4,254	4,400
EBP, employer contribution, matching percentage	3.00%
Employee benefit plan contribution vested	100.00%
EBP, participant contribution, automatic, deferral rate	5.00%
Employee benefit plan participant contribution automatic deferral rate increase	1.00%
Employee benefit plan participant contribution automatic deferral rate maximum	50.00%
Employee benefit plan participant withdrawal account period minimum	24
First 3 percent [Member]
EBP, Description of Plan [Line Items]
EBP, employer contribution, participant compensation matched, percentage	100.00%
4 percent [Member]
EBP, Description of Plan [Line Items]
EBP, employer contribution, participant compensation matched, percentage	50.00%
5 percent [Member]
EBP, Description of Plan [Line Items]
EBP, employer contribution, participant compensation matched, percentage	50.00%
Minimum [Member]
EBP, Description of Plan [Line Items]
EBP, participant contribution, pretax, maximum annual compensation to total compensation, percentage	1.00%
Employee benefit plan participant contribution posttax maximum annual compensation to total compensation percentage	1.00%
Maximum [Member]
EBP, Description of Plan [Line Items]
EBP, participant contribution, pretax, maximum annual compensation to total compensation, percentage	75.00%
Employee benefit plan participant contribution posttax maximum annual compensation to total compensation percentage	6.00%

Employee benefit plan, contribution, vested.

No definition available.

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Namespace Prefix:	eric_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan participant contribution automatic deferral rate increase.

+ References

No definition available.

+ Details

Name:	eric_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRateIncrease
Namespace Prefix:	eric_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan participant contribution automatic deferral rate maximum.

+ References

No definition available.

+ Details

Name:	eric_EmployeeBenefitPlanParticipantContributionAutomaticDeferralRateMaximum
Namespace Prefix:	eric_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan participant contribution posttax maximum annual compensation to total compensation percentage.

+ References

No definition available.

+ Details

Name:	eric_EmployeeBenefitPlanParticipantContributionPosttaxMaximumAnnualCompensationToTotalCompensationPercentage
Namespace Prefix:	eric_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Employee benefit plan participant withdrawal account period minimum.

+ References

No definition available.

+ Details

Name:	eric_EmployeeBenefitPlanParticipantWithdrawalAccountPeriodMinimum
Namespace Prefix:	eric_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-SubTopic 205
-Topic 962
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionMatchingPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage
Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of participants in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6A-02(a))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477804/962-205-S99-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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Namespace Prefix:
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- Details

Name:	eric_ParticipantCompensationMatchedIdentifierAxis=eric_FourPercentMember
Namespace Prefix:
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- Details

Name:	eric_ParticipantCompensationMatchedIdentifierAxis=eric_FivePercentMember
Namespace Prefix:
Data Type:	na
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
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- Details

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