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BUSINESS SEGMENT AND FOREIGN INFORMATION - Yen/Dollar Exchange Rates Used (Detail)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
¥ / $
Dec. 31, 2016
USD ($)
¥ / $
Dec. 31, 2015
USD ($)
¥ / $
Segment Reporting, Other Significant Reconciling Item [Line Items]      
Weighted-average yen/dollar exchange rate | ¥ / $ 112.16 108.70 120.99
Yen percent strengthening (weakening) (3.10%) 11.30% (12.80%)
Exchange effect on pretax operating earnings (in millions) $ (63) $ 218 $ (288)
Yen/dollar exchange rate at December 31 | ¥ / $ 113.00 116.49  
Yen percent strengthening (weakening) 3.10% 3.50%  
Exchange effect on total assets      
Segment Reporting, Other Significant Reconciling Item [Line Items]      
Exchange effect $ 2,593 $ 2,820  
Exchange effect on total liabilities      
Segment Reporting, Other Significant Reconciling Item [Line Items]      
Exchange effect $ 2,848 $ 3,109