Postretirement benefits Schedule of Health Care Cost Trend Rates (Details) - Pension Plan [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Amortization of Prior Service Cost (Credit)	$ 0	$ 0	$ 0
Other changes in benefit plan assets and benefit obligations recognized in other comprehensive income, curtailment	$ 0	$ 0	$ 0
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health Care Cost Trend Rate	6.32%	6.68%	7.01%
Ultimate Health Care Cost Trend Rate	4.50%	4.50%	4.50%
Year that Rate Reaches Ultimate Trend Rate	2038	2038	2038
Non - U.S.
Defined Benefit Plan Disclosure [Line Items]
Amortization of Prior Service Cost (Credit)	$ 0	$ 0	$ 0
Other changes in benefit plan assets and benefit obligations recognized in other comprehensive income, curtailment	$ 3	$ 0	$ 6
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Health Care Cost Trend Rate	5.24%	6.29%	6.61%
Ultimate Health Care Cost Trend Rate	4.00%	4.50%	4.50%
Year that Rate Reaches Ultimate Trend Rate	2040	2029	2029