Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Schedule of supplemental cash flow information

Supplemental cash flow information is as follows (amounts in millions):

	For the Years Ended December 31,
	2016		2015		2014
Supplemental cash flow information:
Cash paid for income taxes, net of refunds	$	121	$	20	$	34
Cash paid for interest	209		193		201