Pension, Other Postretirement Benefits and Savings Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plans, contribution expenses	$ 110	$ 111	$ 111
Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded non-U.S. pension plans in next year	25
Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded non-U.S. pension plans in next year	50
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	0	0
Service cost	2	3	4
Increase (decrease) for plan amendment	0	(14)
Benefits (credit) cost	7	11	(7)
Estimated net actuarial loss that will be amortized from AOCL into benefits cost in the next year	4
Estimated prior service credit that will be amortized from AOCL into benefits cost in the next year	9
Prescription drug subsidy (less than)	1
Postretirement benefits funded status	241	231
Pension benefit obligation	241	234	286
AOCL adjustment	7	(7)
United States
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	6	8	32
Curtailment charge	5
Accumulated benefit obligation	$ 4,994	4,725
United States | Fixed Income Securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	94.00%
United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocation	6.00%
United States | Other (Income) Expense
Defined Benefit Plan Disclosure [Line Items]
Settlement charge			19
United States | Rationalization Charges
Defined Benefit Plan Disclosure [Line Items]
Settlement charge			13
United States | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	$ 15	22
Service cost	3	4	4
Increase (decrease) for plan amendment	0	0
Benefits (credit) cost	73	62	$ 63
Estimated net actuarial loss that will be amortized from AOCL into benefits cost in the next year	110
Estimated prior service credit that will be amortized from AOCL into benefits cost in the next year	0
Postretirement benefits funded status	$ 229	$ 289
Weighted average discount rate	3.85%	3.09%	3.18%
Assumed weighted average long term rate of return	5.25%	4.58%	5.08%
Pension benefit obligation	$ 5,009	$ 4,734	$ 5,331
AOCL adjustment	2,377	2,490
United States | Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefits (credit) cost	3	4	$ (17)
Postretirement benefits funded status	$ 106	$ 112
Weighted average discount rate	3.79%	2.99%	3.02%
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation	$ 3,097	$ 2,688
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	$ 247	218
Pension benefit obligation	277	244
AOCL adjustment	82	59
Non-U.S. | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement payments	5	112
Service cost	26	28	$ 31
Increase (decrease) for plan amendment	(2)	29
Benefits (credit) cost	70	69	$ 57
Estimated net actuarial loss that will be amortized from AOCL into benefits cost in the next year	38
Estimated prior service credit that will be amortized from AOCL into benefits cost in the next year	2
Postretirement benefits funded status	$ 455	$ 310
Weighted average discount rate	2.84%	2.56%	2.70%
Assumed weighted average long term rate of return	2.95%	3.02%	3.12%
Pension benefit obligation	$ 3,195	$ 2,774	$ 3,109
AOCL adjustment	807	642
Non-U.S. | Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefits (credit) cost	4	7	$ 10
Postretirement benefits funded status	$ 135	$ 119
Weighted average discount rate	6.25%	6.13%	5.98%
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		$ 13
Settlement payments		103
Service cost		13
BRAZIL | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment		16
BRAZIL | Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) for plan amendment		$ (14)