XML 30 R37.htm IDEA: XBRL DOCUMENT v3.2.0.727
Acquisitions and Divestitures - Additional Information - 2014 Activity - Argentina Divestiture (Detail) - USD ($)
$ in Millions
6 Months Ended
Mar. 12, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Proceeds from sale of operations   $ 119 $ 381
Argentina [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Proceeds from sale of operations $ 800    
Liabilities assumed $ 52    
Debt assumed beginning date Jun. 30, 2013    
Loss from discontinued operations, net of tax $ 517