Summary of Significant Accounting Policies - Basis of Consolidation Policy Additional Information (Details)	12 Months Ended
	Dec. 31, 2020
Maximum [Member]
Basis of Consolidation [Abstract]
Ownership interest to use equity method	50.00%
Ownership interest to use cost method	20.00%
Minimum [Member]
Basis of Consolidation [Abstract]
Ownership interest to be held for consolidation	50.00%
Ownership interest to use equity method	20.00%