Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current Assets:
Allowance on accounts receivable	$ 96	$ 99
Accumulated depreciation	$ 9,004	$ 8,991
Goodyear Shareholders' Equity:
Preferred stock, par value	$ 0	$ 0
Preferred stock, authorized	50,000,000	50,000,000
Mandatory convertible preferred stock, outstanding	10,000,000	10,000,000
Mandatory convertible preferred stock, liquidation preference	$ 50.00	$ 50.00
Common stock, par value	$ 0	$ 0
Common stock, authorized	450,000,000	450,000,000
Common stock, outstanding shares	246,000,000	245,000,000
Treasury shares	5,000,000	6,000,000