Other (Income) Expense - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income And Expenses [Line Items]
Deconsolidation, gain (loss), gross			$ 286
Professional fees			14
Gain (loss) related to settlement		$ 11	53
Interest income, tax settlement		8	38
Loss from catastrophes		25	12
Other Postretirement Benefits
Other Income And Expenses [Line Items]
Pension settlement and curtailment charges	$ 4
Other Postretirement Benefits | Non-U.S. | Other (Income) Expense
Other Income And Expenses [Line Items]
Pension settlement and curtailment charges	$ 18	$ 6	$ 21