Organization and Nature of Operations - Summary of Company's Principal Subsidiaries and VIEs (Detail) - Variable Interest Entity VIE Activities [Member]	12 Months Ended
Dec. 31, 2025
Guangzhou Chengxingzhidong Motors Technology Co., Ltd. ("Chengxing") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jan. 09, 2015
Equity interest held	100.00%
Principal activities	Investment holding
Guangzhou Xiaopeng Motors Technology Co., Ltd.("Xiaopeng Technology") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	May 12, 2016
Equity interest held	100.00%
Principal activities	Design and technology development
Guangzhou Xiaopeng Motors Manufacturing Co., Ltd. [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Apr. 07, 2017
Equity interest held	100.00%
Principal activities	Design and technology development
Guangzhou Xiaopeng Autopilot Technology Co., Ltd. [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Nov. 18, 2019
Equity interest held	100.00%
Principal activities	Technology development
Guangzhou Xiaopeng Smart Charging Technology Co., Ltd. [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jun. 22, 2020
Equity interest held	100.00%
Principal activities	Smart charging technology development
Guangzhou Zhipeng Manufacturing Co., Ltd. [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jan. 14, 2021
Equity interest held	100.00%
Principal activities	Manufacturing of vehicles
Xiaopeng New Energy Motors Sales (Guangzhou) Co., Ltd. [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jun. 14, 2023
Equity interest held	100.00%
Principal activities	Vehicle wholesale and retail
Zhaoqing Xiaopeng New Energy Investment Co., Ltd.("Zhaoqing Xiaopeng New Energy") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Feb. 13, 2020
Equity interest held	100.00%
Principal activities	Manufacturing of vehicles
Zhaoqing Xiaopeng Motors Co., Ltd. ("Zhaoqing Xiaopeng") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	May 18, 2017
Equity interest held	100.00%
Principal activities	Manufacturing of batterypack
Xiaopeng Motors Sales Co., Ltd. ("Xiaopeng Motors Sales") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jan. 08, 2018
Equity interest held	100.00%
Principal activities	Vehicle wholesale and retail
Xiaopeng Motors Huazhong (Wuhan) Co., Ltd.("Wuhan Xiaopeng") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Apr. 30, 2021
Equity interest held	100.00%
Principal activities	Technology developmentand vehicle retail
Wuhan Xiaopeng Smart Manufacturing Co., Ltd. [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Aug. 16, 2021
Equity interest held	100.00%
Principal activities	Manufacturing of batterypack and electric drivesystem
Shanghai Xiaopeng Motors Technology Co., Ltd.("Shanghai Xiaopeng") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Feb. 12, 2018
Equity interest held	100.00%
Principal activities	Technology developmentand vehicle retail
Shenzhen Xiaopeng Motors Supply Chain Management Co., Ltd [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jan. 05, 2024
Equity interest held	100.00%
Principal activities	Export trading
XPeng Huitian Holding Limited [Member] \| VIRGIN ISLANDS, BRITISH
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Oct. 12, 2020
Equity interest held	100.00%
Principal activities	Investment holding
Dogotix Inc. [Member] \| VIRGIN ISLANDS, BRITISH
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Oct. 09, 2023
Equity interest held	100.00%
Principal activities	Investment holding
XPeng (Hong Kong) Limited [Member] \| HONG KONG
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Feb. 12, 2019
Equity interest held	100.00%
Principal activities	Investment holding
Guangzhou Zhipeng IoV Technology Co., Ltd. ("Zhipeng IoV") [member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
VIE -Date of incorporation or acquisition	May 23, 2018
VIA -Principal activities	Business of development and the operation of an Internet of Vehicles network
Guangzhou Yidian Smart Mobility Technology Co., Ltd. ("Yidian Smart Mobility") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
VIE -Date of incorporation or acquisition	May 24, 2018
VIA -Principal activities	Business of provision of online-hailing services through online platform
Guangzhou Xintu Technology Co., Ltd. ("Xintu Technology") [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
VIE -Date of incorporation or acquisition	Apr. 27, 2021
VIA -Principal activities	Surveying and mapping
Guangdong Intelligent Insurance Agent Co., Ltd. ("GIIA", formerly known as Qingdao Miaobao Insurance Agent Co., Ltd.) [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
VIE -Date of incorporation or acquisition	Jul. 22, 2022
VIA -Principal activities	Insurance agency
Jiangsu Zhipeng Kongjian Information Technology Co., Ltd. ("Zhipeng Kongjian", formerly known as Jiangsu Zhitu Technology Co., Ltd., a subsidiary of Xintu Technology) [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
VIE -Date of incorporation or acquisition	Jun. 23, 2021
VIA -Principal activities	Surveying and mapping
Guangzhou Pengxiao Technology Co Ltd Guangzhou Pengxiao Technology a subsidiary of Zhipeng IoV [Member] \| CHINA [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
VIE -Date of incorporation or acquisition	Oct. 11, 2024
VIA -Principal activities	Business of development and the operation of an Internet of Vehicles network
XPeng European Holding B.V. [Member] \| NETHERLANDS
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Date of incorporation or acquisition	Jan. 28, 2021
Equity interest held	100.00%
Principal activities	Investment holding

Date when an entity was incorporated

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- Definition

A description of the principal activities of an investee accounted for under the equity method.

+ References

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
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- Definition

Date the relationship between reporting entity and the Variable Interest Entity (VIE) began, in YYYY-MM-DD format.

+ References

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- Definition

Description of the transactions or business conducted by the Variable Interest Entity (VIE), including how the VIE is financed.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-5A

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-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-4

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481203/810-10-50-6

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- Definition

Organization Consolidation And Presentation Of Financial Statements [Line Items]

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