Consolidated Statements Of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements Of Comprehensive Loss [Abstract]
Net loss	$ (75)	$ (186)
Pension settlement costs, net of tax	25
Other comprehensive income, net of tax	36	6
Comprehensive loss	$ (14)	$ (180)