Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statements Of Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ (196)	$ 133	$ 115
Pension settlement costs, net of tax (see Notes 13 and 16)			27
Other comprehensive income (loss), net of tax (see Note 13)	51	(143)	196
Less: Income attributable to the noncontrolling interest in a partnership			2
Comprehensive income (loss)	$ (145)	$ (10)	$ 336