Retirement Plans and Other Retiree Benefits - Summary of Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Retiree Benefit Plans
Components of Net Periodic Benefit Cost
Service cost	$ 26	$ 20	$ 15
Interest cost	35	37	41
Expected return on plan assets	0	(2)	(3)
Amortization of transition and prior service costs (credits)	0	0	0
Amortization of actuarial loss	23	18	11
Net periodic benefit cost	84	73	64
Other postretirement charges	0	0	0
Total pension cost	$ 84	$ 73	$ 64
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate	2.88%	3.56%	4.43%
Expected long-term rate of return on plan assets	5.70%	6.30%	6.60%
Long-term rate of compensation increase	0.00%	0.00%	0.00%
ESOP growth rate	10.00%	10.00%	10.00%
Medical cost trend rate of increase	6.00%	6.00%	6.00%
Interest Crediting Rate	0.00%	0.00%	0.00%
United States | Pension Plans
Components of Net Periodic Benefit Cost
Service cost	$ 0	$ 1	$ 1
Interest cost	61	74	90
Expected return on plan assets	(106)	(111)	(103)
Amortization of transition and prior service costs (credits)	0	0	0
Amortization of actuarial loss	47	46	51
Net periodic benefit cost	2	10	39
Other postretirement charges	(3)	4	7
Total pension cost	$ (1)	$ 14	$ 46
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate	2.65%	3.40%	4.38%
Expected long-term rate of return on plan assets	5.70%	6.30%	6.60%
Long-term rate of compensation increase	3.50%	3.50%	3.50%
ESOP growth rate	0.00%	0.00%	0.00%
Medical cost trend rate of increase	0.00%	0.00%	0.00%
Interest Crediting Rate	2.48%	3.21%	4.26%
International | Pension Plans
Components of Net Periodic Benefit Cost
Service cost	$ 19	$ 17	$ 14
Interest cost	20	21	22
Expected return on plan assets	(20)	(22)	(19)
Amortization of transition and prior service costs (credits)	1	0	1
Amortization of actuarial loss	11	9	9
Net periodic benefit cost	31	25	27
Other postretirement charges	1	0	1
Total pension cost	$ 32	$ 25	$ 28
Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost
Discount rate	1.61%	2.06%	2.80%
Expected long-term rate of return on plan assets	2.93%	3.38%	4.06%
Long-term rate of compensation increase	2.62%	2.83%	2.86%
ESOP growth rate	0.00%	0.00%	0.00%
Medical cost trend rate of increase	0.00%	0.00%	0.00%
Interest Crediting Rate	0.83%	0.85%	0.85%