XML 57 R47.htm IDEA: XBRL DOCUMENT v3.8.0.1
MERGER WITH PLUM CREEK Additional Information (Details) - Plum Creek - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Feb. 19, 2016
Sep. 30, 2016
Sep. 30, 2016
Business Acquisition [Line Items]      
Total assets acquired $ 10,000    
Consideration transferred 6,400    
Total liabilities assumed $ 3,600    
Non-recurring merger-related costs   $ 10 $ 144