Employee Benefit Plans - Domestic Operations and Net Periodic Benefit Cost (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 01, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension | MEC
Defined Benefit Plan Disclosure [Line Items]
Acquisition	$ 81
Settlement		$ (5)
Pension | United States
Defined Benefit Plan Disclosure [Line Items]
Acquisition		0	$ 81
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
Pension | United States | MEC
Defined Benefit Plan Disclosure [Line Items]
Acquisition		(1)	81
Service cost		20	8	6
Interest cost		22	25	30
Expected return on plan assets		(37)	(40)	(41)
Settlement		(5)	0	0
Net amortization		1	1	1
Net periodic benefit cost (credit)		1	(6)	(4)
Pension | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost		16	16	16
Interest cost		31	40	49
Expected return on plan assets		(111)	(101)	(100)
Settlement		10	17	26
Net amortization		55	43	46
Net periodic benefit cost (credit)		1	15	37
Other Postretirement
Defined Benefit Plan Disclosure [Line Items]
Acquisition		0	37
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)
Other Postretirement | MEC
Defined Benefit Plan Disclosure [Line Items]
Acquisition	$ 37	(5)	37
Service cost		9	4	5
Interest cost		8	7	10
Expected return on plan assets		(10)	(14)	(13)
Settlement		0	0	0
Net amortization		(4)	(5)	(3)
Net periodic benefit cost (credit)		$ 3	$ (8)	$ (1)