Long-Term Debt - RE Facility (Details)	6 Months Ended
	Jun. 30, 2022 USD ($) subsidiary	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Amount outstanding under credit facility	$ 12,959,000,000	$ 12,978,000,000
R E Facility | Line of Credit
Debt Instrument [Line Items]
Number of subsidiaries | subsidiary	1
Aggregate principal amount outstanding	$ 50,000,000
Number of guaranteed subsidiaries | subsidiary	4
Amount outstanding under credit facility	$ 2,000,000
Interest rate	2.59%
R E Facility | Line of Credit | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
R E Facility | Line of Credit | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1.50%
Interest rate, base rate floor (as a percent)	0.00%