Variable Interest Entities - Schedule of Aggregate Assets, Liabilities, and Our Exposure to Loss from those VIEs (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Assets	$ 35,087,698	$ 34,049,715
Total liabilities	30,033,354	$ 29,014,756
Debt and equity [member] | Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	898,054
Total liabilities	400,591
Gain (Loss) on Price Risk Derivatives, Net	65,935
Miscellaneous Investments [Member] | Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	490,353
Total liabilities	398,381
Gain (Loss) on Price Risk Derivatives, Net	65,935
Partnership Interest [Member] | Variable Interest Entity Not Primary Beneficiary [Member]
Variable Interest Entity [Line Items]
Assets	407,701
Total liabilities	2,210
Gain (Loss) on Price Risk Derivatives, Net