Employee Benefit Plans - EEGH - Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Postretirement
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12	$ 7	$ 8
Interest cost	19	21	27
Expected return on plan assets	(22)	(34)	(40)
Settlement	0	0	0
Net amortization	(3)	(4)	(6)
Net periodic benefit cost (credit)	6	(10)	(11)
United States | Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	30	17	16
Interest cost	78	93	111
Expected return on plan assets	(134)	(140)	(154)
Settlement	3	0	0
Net amortization	25	32	31
Net periodic benefit cost (credit)	$ 2	2	4
United States | Pension | EEGH
Defined Benefit Plan Disclosure [Line Items]
Service cost		5	6
Interest cost		8	11
Expected return on plan assets		(47)	(54)
Settlement		0	1
Net amortization		5	7
Net periodic benefit cost (credit)		(29)	(29)
United States | Other Postretirement | EEGH
Defined Benefit Plan Disclosure [Line Items]
Service cost		1	1
Interest cost		4	5
Expected return on plan assets		(16)	(16)
Settlement		0	1
Net amortization		(3)	(2)
Net periodic benefit cost (credit)		$ (14)	$ (11)