Restructuring Program - Additional Information (Detail) (USD $)	9 Months Ended		3 Months Ended		9 Months Ended		0 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Severance And Related Costs	Sep. 30, 2014 2014-2018 Restructuring Program	Sep. 30, 2014 2014-2018 Restructuring Program	May 06, 2014 2014-2018 Restructuring Program	May 06, 2014 2014-2018 Restructuring Program Maximum Scenario, Forecast	Sep. 30, 2014 2014-2018 Restructuring Program Selling, general and administrative expenses	Sep. 30, 2014 2014-2018 Restructuring Program Selling, general and administrative expenses	May 06, 2014 2014-2018 Restructuring Program Cash Expense	May 06, 2014 2014-2018 Restructuring Program Non Cash Expense	Sep. 30, 2014 2014-2018 Restructuring Program Severance And Related Costs	Sep. 30, 2014 2012-2014 Restructuring Program	Sep. 30, 2013 2012-2014 Restructuring Program	Sep. 30, 2014 2012-2014 Restructuring Program	Sep. 30, 2013 2012-2014 Restructuring Program	Dec. 31, 2012 2012-2014 Restructuring Program	Dec. 31, 2013 2012-2014 Restructuring Program	Sep. 30, 2014 2012-2014 Restructuring Program Selling, general and administrative expenses	Sep. 30, 2013 2012-2014 Restructuring Program Selling, general and administrative expenses	Sep. 30, 2014 2012-2014 Restructuring Program Selling, general and administrative expenses	Sep. 30, 2013 2012-2014 Restructuring Program Selling, general and administrative expenses	Sep. 30, 2014 2012-2014 Restructuring Program Severance And Related Costs	Dec. 31, 2013 2012-2014 Restructuring Program Severance And Related Costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost						$ 3,500,000,000				$ 2,500,000,000	$ 1,000,000,000		$ 925,000,000		$ 925,000,000
Approved restructuring program cost related to capital expenditure	1,129,000,000	1,028,000,000					2,200,000,000
Restructuring charges			73,000,000	25,000,000	26,000,000							26,000,000	163,000,000	43,000,000	259,000,000	131,000,000							182,000,000
Implementation costs				42,000,000	51,000,000			42,000,000	51,000,000				23,000,000	20,000,000	66,000,000	31,000,000			23,000,000	20,000,000	66,000,000	31,000,000
Restructuring and related activities, authorized amount																	1,500,000,000
Restructuring and related cost, cost incurred													765,000,000		765,000,000
Cash spent					2,000,000							2,000,000	44,000,000		110,000,000								110,000,000
Non-cash asset write-downs													53,000,000		77,000,000
Net restructuring liability				$ 24,000,000	$ 24,000,000							$ 24,000,000	$ 140,000,000		$ 140,000,000			$ 68,000,000					$ 140,000,000	$ 68,000,000