Contingent Liabilities - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014 Tire	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Minimum estimated sale of passenger, light truck, SUV, radial medium truck and motorcycle tires per year in North America	30,000,000
Maximum estimated sale of passenger, light truck, SUV, radial medium truck and motorcycle tires per year in North America	35,000,000
Estimated number of Company produced tires of different specifications	300,000,000
Products liability expenses, Minimum	$ 0
Products liability expenses, Maximum	33,000,000
Increased its products liability reserve	47,609,000	60,091,000
Increase in products liability reserve due to self insured incidents	49,324,000	50,436,000
Increase in products liability reserve due to revised estimates of future settlements for unasserted and premature claims		8,298,000
Increase (Decrease) in products liability reserve due to changes in estimated amounts on existing reserves	(1,536,000)	1,357,000
Decrease in products liability reserve due to revised estimates of future settlements for unasserted and premature claims	(179,000)
Period for resolution of few cases	5 years
Company paid to resolve cases and claims	58,231,000	76,927,000
Products liability reserve balance	178,891,000	189,513,000
Current portion products liability reserve balance	69,892,000	70,472,000
Products liability expenses	78,143,000	89,044,000	103,610,000
Percentage of workforce subject to collective bargaining units	38.00%
Non cancelable purchase order commitments for capital expenditures	$ 77,781,000