Fair Value of Financial Instruments Unobservable Input Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance as of the beginning of the period	$ 52	$ 117	$ 85	$ 137
Net realized and unrealized (gains)/losses	(19)	(62)	(56)	(83)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3	2
Transfers out of Level 3 to Level 2		3	6	4
Balance as of the end of the period	$ 35	$ 58	$ 35	$ 58