Accounting Policies - Restricted Cash (Parenthetical) (Details) - USD ($) $ in Millions		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Restricted Cash	[1]	$ 76	$ 85	$ 66
Cooper Tire [Member]
Business Acquisition [Line Items]
Restricted Cash		$ 25

[1] Includes remaining Cooper Tire restricted cash acquired of $25 million at December 31, 2021.