Pension, Savings and Other Postretirement Benefit Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Defined Benefit Plan Disclosure [Line Items]
Postretirement benefits expense (credit)	$ 3	$ 1	$ 6	$ 4
Defined contribution plans, contribution expenses	31	25	86	75
U.S.
Defined Benefit Plan Disclosure [Line Items]
Define benefit plan net funded (unfunded) status	12		12
Other post retirement plan net unfunded status	(215)		(215)
Contributions to pension plans	29		29
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Define benefit plan net funded (unfunded) status	(62)		(62)
Contributions to pension plans	11		18
Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year	50		50
Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected contribution to funded pension plans in current year	75		75
Pension Plan | Other (Income) Expense
Defined Benefit Plan Disclosure [Line Items]
Pension settlement charges	$ 11	16	$ 30	19
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Curtailment credit (charge)				4
Other Postretirement Benefits Plan | Other (Income) Expense | U.S.
Defined Benefit Plan Disclosure [Line Items]
Pension settlement and termination benefits		$ 2		$ 7