Related Party Transactions - Summary of Loans (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Affiliated Entity
Related Party Transaction [Line Items]
Loans receivable from related parties	$ 3,457,000,000	$ 2,793,000,000
HMUS | Line of Credit
Related Party Transaction [Line Items]
Loans receivable from related parties	2,196,000,000	1,576,000,000
HNAH | Line of Credit
Related Party Transaction [Line Items]
Loans receivable from related parties	1,250,000,000	1,000,000,000
Other short-term affiliate lending | Line of Credit
Related Party Transaction [Line Items]
Loans receivable from related parties	0	0
Other short-term affiliate lending | Short Term Lending
Related Party Transaction [Line Items]
Loans receivable from related parties	$ 11,000,000	$ 217,000,000