DISPOSITIONS AND ACQUISITIONS (Assets and Liabilities of TFHL) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets
Total current assets held for sale	$ 344	$ 920
Total long-term assets held for sale	0	4,386	$ 4,300
Liabilities
Total current liabilities held for sale	205	131
Total long-term liabilities held for sale	0	865
Noncontrolling interests	$ 3,206	4,216
TF Holdings Limited | Discontinued operations, held-for-sale
Assets
Cash and cash equivalents		29
Inventories		584
Receivables and other current assets		131
Total current assets held for sale		744
Property, plant, equipment and mine development costs, net		3,261
Inventories		608
Other assets		241
Total long-term assets held for sale		4,110
Liabilities
Accounts payable and accrued liabilities		108
Total current liabilities held for sale		108
Deferred income taxes		681
Asset retirement obligations and other liabilities		37
Total long-term liabilities held for sale		718
Noncontrolling interests		$ 1,178