Restructuring and Other Charges - Narrative (Details) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2021 USD ($)	Dec. 31, 2021 USD ($) employee segment	Dec. 31, 2020 USD ($) employee	Dec. 31, 2019 USD ($) employee
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 90	$ 182	$ 582
Pension, Other post-retirement benefits (costs) and deferred compensation - net settlement and curtailments		(75)	(69)	7
Accelerated depreciation		15	2
Gain (loss) on sale of assets		12	3	1
Benefit from termination of plan			3
Impairment of assets to be disposed of		15	5
Business exit costs				7
Asset impairment charges		15	5	442
Pension benefits paid
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	$ 34		69
Pension, Other post-retirement benefits (costs) and deferred compensation - net settlement and curtailments		(75)
Curtailment (charge) benefit		(6)	0	0
Other postretirement benefits
Restructuring Cost and Reserve [Line Items]
Curtailment (charge) benefit		0	2	58
Engine Products | Disks Long Lived Asset Group
Restructuring Cost and Reserve [Line Items]
Asset impairment charges				247
Engineered Structures | Disks Long Lived Asset Group
Restructuring Cost and Reserve [Line Items]
Asset impairment charges				181
Layoff costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 7	$ 113	$ 69
Number of employees associated with layoff costs | employee		253	4,301	917
Layoff costs | Corporate
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee			23	494
Layoff costs | Engineered Structures
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee		171
Layoff costs | Engine Products
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee		75	1,706	103
Layoff costs | Fastening Systems
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee		6	1,675	132
Layoff costs | Corporate Aircraft
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee		1
Layoff costs | Engineered Structures
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee			805	128
Layoff costs | Forged Wheels
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | employee			92	60
Asset Impairment Associated Facility Closure
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 4	$ 1
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		4	6
Facility Closing | U.K. Forging Business
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges			5
Reversal Of Prior Period Programs
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ (3)	(21)	$ (6)
2021 Restructuring Programs
Restructuring Cost and Reserve [Line Items]
Number of employees associated with layoff costs | segment		253
Number of employees separated | segment		66
U.K. and U.S. pension plan settlement accounting | Pension benefits paid
Restructuring Cost and Reserve [Line Items]
Pension, Other post-retirement benefits (costs) and deferred compensation - net settlement and curtailments			74
Impairment Of A Cost Method Investment
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges			5	5
Impairment Of Disks
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				428
UK Forgings
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				46
Impairment For Trade Name Intangible Asset And Fixed Assets
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				14
Small Additive Business
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				13
Corporate Aircraft
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				12
Pension Settlement Cost
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 12	$ 8	9
Special Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				2
Employee Severance Life Insurance Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				$ 16