Summary of Significant Accounting Policies - Summary of Useful Lives of Intangible Assets Other than Goodwill (Detail)	12 Months Ended
	Dec. 31, 2021
Emission Allowances [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Useful lives of intangible assets other than goodwill	Indefinite
Land Use Rights [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Useful lives of intangible assets other than goodwill	Indefinite
Interconnection [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Intangible asset useful life	17 years
Interconnection [Member] | Minimum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Intangible asset useful life	10 years
Interconnection [Member] | Maximum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Intangible asset useful life	25 years
Customer Contracts [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Intangible asset useful life	15 years
Customer Contracts [Member] | Minimum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Intangible asset useful life	2 years
Customer Contracts [Member] | Maximum [Member]
Disclosure Details Of Useful Lives Of Intangible Assets Other Than Goodwill [Line Items]
Intangible asset useful life	15 years