Pension, Other Postretirement Benefits and Savings Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate	1.70%	2.30%
Defined contribution plans, contribution expenses	$ 100	$ 110	$ 111
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded non-U.S. pension plans in next year	50
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded non-U.S. pension plans in next year	25
United States
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 5,220	4,994
United States | Private Equity and Private Credit Securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	6.00%
United States | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	94.00%
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 3,284	3,097
Non-U.S. | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	95.00%
Non-U.S. | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	5.00%
Non-U.S. | Unfunded Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 264	247
Pension benefit obligation	299	277
AOCL adjustment	90	82
Pension Plan | United States
Defined Benefit Plan Disclosure [Line Items]
Settlement charges	28
Curtailment credit (charge) and special termination benefits		5
Settlement payments	56	15
Service cost	4	3	4
Benefits cost	77	73	$ 62
Postretirement benefits funded status	$ 265	$ 229
Weighted average discount rate	2.66%	3.85%	3.09%
Assumed weighted average long term rate of return	4.22%	5.25%	4.58%
Pension benefit obligation	$ 5,235	$ 5,009	$ 4,734
AOCL adjustment	2,350	2,377
Pension Plan | United States | Other (Income) Expense
Defined Benefit Plan Disclosure [Line Items]
Settlement charges	24	6	8
Pension Plan | United States | Rationalizations
Defined Benefit Plan Disclosure [Line Items]
Settlement charges	4
Pension Plan | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	8	5
Service cost	30	26	28
Increase (decrease) for plan amendment	3	(2)
Benefits cost	67	70	$ 69
Postretirement benefits funded status	$ 341	$ 455
Weighted average discount rate	2.26%	2.84%	2.56%
Assumed weighted average long term rate of return	2.52%	2.95%	3.02%
Pension benefit obligation	$ 3,382	$ 3,195	$ 2,774
AOCL adjustment	661	807
Pension Plan | Non-U.S. | Other (Income) Expense
Defined Benefit Plan Disclosure [Line Items]
Curtailment credit (charge)	6
Pension Plan | United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Settlement charges			13
Service cost			16
Pension Plan | United Kingdom | Other (Income) Expense
Defined Benefit Plan Disclosure [Line Items]
Settlement payments			103
Pension Plan | BRAZIL
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment			16
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	3
Benefits cost	1	7	11
Prescription drug subsidy (less than)	1
Postretirement benefits funded status	236	241
Pension benefit obligation	236	241	234
AOCL adjustment	23	7
Other Postretirement Benefits | United States
Defined Benefit Plan Disclosure [Line Items]
Curtailment credit (charge)	4
Termination benefit charge	5
Benefits cost	1	3	$ 4
Postretirement benefits funded status	$ 106	$ 106
Weighted average discount rate	2.68%	3.79%	2.99%
Other Postretirement Benefits | Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Benefits cost	$ 0	$ 4	$ 7
Postretirement benefits funded status	$ 130	$ 135
Weighted average discount rate	5.68%	6.25%	6.13%
Other Postretirement Benefits | BRAZIL
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment			$ (14)