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Accounts Receivable and Contract Assets - Schedule of Movement of Provision for Accounts Receivable (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Beginning balance	¥ 50,544
Impact due to adoption of new revenue standard		¥ 16,501
Current period accrual	274,375	107,352
Current period reversal	(12,493)	(700)
Current period write-off	(166,727)	(72,609)
Ending balance	¥ 145,699	¥ 50,544

X

- Definition

Allowance For Doubtful Accounts Receivable Current Period Accrual

+ References

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- Definition

Allowance for doubtful accounts receivable current period reversal.

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- Definition

Allowance for doubtful accounts receivable current period write-off.

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- Definition

Impact on Allowance For Doubtful Accounts Receivable due to adoption of new revenue standard

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No definition available.

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- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5074-111524

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446

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