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Restructuring Program - Additional Information (Detail) (USD $)
 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended 30 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
May 06, 2014
2014-2018 Restructuring Program
Jun. 30, 2014
2014-2018 Restructuring Program
Jun. 30, 2014
2014-2018 Restructuring Program
May 06, 2014
2014-2018 Restructuring Program
Maximum
Scenario, Forecast
May 06, 2014
2014-2018 Restructuring Program
Cash Expense
May 06, 2014
2014-2018 Restructuring Program
Non Cash Expense
Jun. 30, 2014
2012-2014 Restructuring Program
Jun. 30, 2013
2012-2014 Restructuring Program
Jun. 30, 2014
2012-2014 Restructuring Program
Jun. 30, 2013
2012-2014 Restructuring Program
Dec. 31, 2012
2012-2014 Restructuring Program
Jun. 30, 2014
2012-2014 Restructuring Program
Dec. 31, 2013
2012-2014 Restructuring Program
Jun. 30, 2014
Selling, general and administrative expenses
2014-2018 Restructuring Program
Jun. 30, 2014
Selling, general and administrative expenses
2014-2018 Restructuring Program
Jun. 30, 2014
Selling, general and administrative expenses
2012-2014 Restructuring Program
Jun. 30, 2013
Selling, general and administrative expenses
2012-2014 Restructuring Program
Jun. 30, 2014
Selling, general and administrative expenses
2012-2014 Restructuring Program
Jun. 30, 2013
Selling, general and administrative expenses
2012-2014 Restructuring Program
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                    
Approved restructuring program cost related to capital expenditure 724,000,000 568,000,000       2,200,000,000                              
Restructuring charges       1,000,000 1,000,000       54,000,000 48,000,000 96,000,000 88,000,000                  
Implementation costs       9,000,000 9,000,000       19,000,000 7,000,000 43,000,000 11,000,000       9,000,000 9,000,000 19,000,000 7,000,000 43,000,000 11,000,000
Restructuring and related activities, authorized amount                         1,500,000,000                
Restructuring and related cost, cost incurred                           579,000,000              
Cash spent                 38,000,000   66,000,000                    
Non-cash asset write-downs and other non-cash settlements                 11,000,000   24,000,000                    
Net restructuring liability                 $ 74,000,000   $ 74,000,000     $ 74,000,000 $ 68,000,000