Supplementary Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Cash paid for interest and income taxes was as follows:

	Year Ended December 31,
(Dollars in millions)	2016		2015		2014
Interest paid, net of capitalized interest	$	467	$	477	$	511
Income taxes paid, net of refunds	161		331		386