Employee Benefit Plans - Contributions and Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Schedule of Defined Benefit Plans Disclosures [Line Items]
Defined benefit plan, contributions by employer	$ 38,000,000	$ 41,000,000	$ 160,000,000
Defined benefit plan, expected future employer contributions	160,000,000
Pension Benefits
Schedule of Defined Benefit Plans Disclosures [Line Items]
Defined benefit plan, contributions by employer	32,000,000	35,000,000	135,000,000
Defined benefit plan, expected future employer contributions	135,000,000
Retiree Health
Schedule of Defined Benefit Plans Disclosures [Line Items]
Defined benefit plan, contributions by employer	6,000,000	6,000,000	25,000,000
Defined benefit plan, expected future employer contributions	25,000,000
Reduction in the Company's postretirement benefit obligation	23,000,000	0
United States | Pension Benefits
Schedule of Defined Benefit Plans Disclosures [Line Items]
Defined benefit plan, contributions by employer	6,000,000	6,000,000	24,000,000
Defined benefit plan, expected future employer contributions	25,000,000
Reduction in the Company's postretirement benefit obligation	0	0
United States | Pension Benefits | Qualified Plan
Schedule of Defined Benefit Plans Disclosures [Line Items]
Mandatory future contributions	0
Non-U.S. Plans | Pension Benefits
Schedule of Defined Benefit Plans Disclosures [Line Items]
Defined benefit plan, contributions by employer	26,000,000	29,000,000	$ 111,000,000
Defined benefit plan, expected future employer contributions	110,000,000
Reduction in the Company's postretirement benefit obligation	$ 0	$ 0