Accounting Policies - Restricted Cash (Details) - USD ($) $ in Millions		Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Cash and Cash Equivalents		$ 1,187	$ 1,539	$ 1,057
Restricted Cash	[1]	71		72
Total Cash, Cash Equivalents and Restricted Cash		$ 1,258	$ 1,624	$ 1,129	$ 974

[1] Includes remaining Cooper Tire restricted cash acquired of $26 million at September 30, 2021.