Revenue, Deferred Revenue, Deferred Costs and Other - Other Disclosures (Details)	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Product and Service Concentration Risk \| Revenue from Contract with Customer \| Access Fees Revenue
Revenue, Deferred Revenue, Deferred Costs and Other
Concentration risk (as a percent)	86.00%	76.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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