Off-Balance Sheet Arrangements, Guarantees and Other Commitments - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Consolidated venture capital and private equity fund investments
Commitments and Contingencies Disclosure [Line Items]
Commitments expiration period	10 years
Consolidated venture capital and private equity fund investments | Lower Limit
Commitments and Contingencies Disclosure [Line Items]
Fund commitments investment cycle	5 years
Consolidated venture capital and private equity fund investments | Upper Limit
Commitments and Contingencies Disclosure [Line Items]
Fund commitments investment cycle	7 years
Standby Letter of Credit
Commitments and Contingencies Disclosure [Line Items]
Deferred revenue	$ 16.9	$ 17.2
Collateral in the form of cash	$ 1,700.0