Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000915389 (http://www.sec.gov/CIK)

Inventory Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Inventory Disclosure [Abstract]
Schedule of Inventories	December 31, (Dollars in millions) 2016   2015         Finished goods $ 997   $ 1,063 Work in process 198   212 Raw materials and supplies 473   500 Total inventories at FIFO or average cost 1,668   1,775 Less: LIFO reserve 264   296 Total inventories $ 1,404   $ 1,479