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Fair Value Measurements - Fair Value Option on Consolidated VIEs and Equity Method Investments (Details)
$ in Millions
3 Months Ended
Mar. 31, 2021
USD ($)
Real Estate Ventures  
Fair Value Option, Quantitative Disclosures  
Pre-tax gain (loss) due to change in fair value of assets and liabilities for which the fair value option was elected $ 9.3