Business Segments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sales:
Net Sales	$ 20,992	$ 22,767	$ 18,832
North American Tire [Member]
Sales:
Net Sales	9,666	9,859	8,205
Europe, Middle East and Africa Tire [Member]
Sales:
Net Sales	6,884	8,040	6,407
Latin American Tire [Member]
Sales:
Net Sales	2,085	2,472	2,158
Asia Pacific Tire [Member]
Sales:
Net Sales	$ 2,357	$ 2,396	$ 2,062