Number of days after the completion of the merger for commencement of exercise of warrants.

No definition available.

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Namespace Prefix:	exc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- 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

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Value of input used to measure outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Details

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Namespace Prefix:
Data Type:	na
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- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=exc_EcarxPublicWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=exc_EcarxPrivateWarrantsMember
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Data Type:	na
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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Warrant liabilities - ECARX Warrants in connection with the Merger (Details)	1 Months Ended
	Dec. 31, 2022 shares	Dec. 31, 2025 $ / shares decimal	Dec. 31, 2024 decimal $ / shares
ECARX Warrants
Warrant liabilities
Number of warrants issued (in shares)	23,871,971
ECARX Public Warrants
Warrant liabilities
Number of warrants issued (in shares)	14,999,971
Number of days after the completion of the Merger for commencement of exercise of warrants	30 days
Exercise price of warrants, (in USD per share) \| $ / shares		$ 11.50
Warrant term		5 years
ECARX Private Warrants
Warrant liabilities
Number of warrants issued (in shares)	8,872,000
Risk-free rate of return (%) \| Significant Unobservable Inputs (Level 3) \| ECARX Private Warrants
Warrant liabilities
Warrants measurement input		0.0347	0.0427
Volatility \| Significant Unobservable Inputs (Level 3) \| ECARX Private Warrants
Warrant liabilities
Warrants measurement input		0.7100	0.5020
Expected dividend yield \| Significant Unobservable Inputs (Level 3) \| ECARX Private Warrants
Warrant liabilities
Warrants measurement input		0.000	0.000
Expected term \| Significant Unobservable Inputs (Level 3) \| ECARX Private Warrants
Warrant liabilities
Warrants measurement input \| decimal		2	3
Fair value of the underlying ordinary shares (in USD or RMB per share) \| Significant Unobservable Inputs (Level 3) \| ECARX Private Warrants
Warrant liabilities
Warrants measurement input \| $ / shares		1.72	2.11