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Warrant liabilities - ECARX Warrants in connection with the Merger - Movements (Details) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2022 CNY (¥)
ECARX Warrants |
Warrant liabilities |
Addition | ¥ 13,172
Change in fair value included in losses | 3,245
Foreign exchange translation | 127
Liability at the end | 16,544
ECARX Public Warrants |
Warrant liabilities |
Addition | 8,277
Change in fair value included in losses | 1,991
Foreign exchange translation | 78
Liability at the end | 10,346
ECARX Private Warrants |
Warrant liabilities |
Addition | 4,895
Change in fair value included in losses | 1,254
Foreign exchange translation | 49
Liability at the end | ¥ 6,198

X
- Definition The amount of increase in warrants or rights outstanding, through additions. + References No definition available. + Details
Name: | exc_WarrantsAndRightsOutstandingAdditions
Namespace Prefix: | exc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of increase (decrease) in warrants or rights outstanding, through changes in fair value included in losses. + References No definition available. + Details
Name: | exc_WarrantsAndRightsOutstandingChangeInFairValueIncludedInLosses
Namespace Prefix: | exc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of increase (decrease) in warrants or rights outstanding, through differences from foreign exchange translation. + References No definition available. + Details
Name: | exc_WarrantsAndRightsOutstandingForeignExchangeTranslations
Namespace Prefix: | exc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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

X
- Definition Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | us-gaap_WarrantsAndRightsOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=exc_EcarxWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=exc_EcarxPrivateWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |