Fair Value Measurements - EEGH (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
EEGH | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	$ 13	$ 0
Recurring
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	10,843	9,918
Derivative liability	(277)	(121)
Recurring | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	237	201
Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	16	20
Derivative liability	(3)	(9)
Recurring | EEGH | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	13
Level 1 | Recurring
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	9,160	7,562
Derivative liability	(2)	(6)
Level 1 | Recurring | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	237	201
Level 1 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	13	0
Derivative liability	0	0
Level 1 | Recurring | EEGH | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	13
Level 2 | Recurring
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	1,637	2,180
Derivative liability	(123)	(152)
Level 2 | Recurring | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	0	0
Level 2 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	3	20
Derivative liability	(3)	(9)
Level 2 | Recurring | EEGH | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	0
Level 3 | Recurring
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	93	197
Derivative liability	(225)	(19)
Level 3 | Recurring | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	0	0
Level 3 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Assets, fair value	0	0
Derivative liability	0	0
Level 3 | Recurring | EEGH | Investment funds
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Investment funds	0
Foreign currency exchange rate derivatives | Recurring
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative assets	3	20
Derivative liability	(3)	(2)
Foreign currency exchange rate derivatives | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative assets	3	20
Derivative liability	(3)	(2)
Foreign currency exchange rate derivatives | Level 1 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative assets	0	0
Derivative liability	0	0
Foreign currency exchange rate derivatives | Level 2 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative assets	3	20
Derivative liability	(3)	(2)
Foreign currency exchange rate derivatives | Level 3 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative assets	0	0
Derivative liability	0	0
Commodity derivatives | Recurring
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative assets	302	188
Derivative liability	$ (266)	(54)
Commodity derivatives | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		(1)
Commodity derivatives | Level 1 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		0
Commodity derivatives | Level 2 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		(1)
Commodity derivatives | Level 3 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		0
Interest rate contracts | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		(6)
Interest rate contracts | Level 1 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		0
Interest rate contracts | Level 2 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		(6)
Interest rate contracts | Level 3 | Recurring | EEGH
Fair Value, Assets (Liabilities), Net, Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative liability		$ 0