Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (103)	$ (22)	$ (130)	$ (19)
Other comprehensive (loss) income:
Pension, postretirement and postemployment benefit-related items, net of income taxes of $11 and $11 for the three and six months ended March 31, 2016 and $10 and $11 for the three and six months ended March 31, 2015, respectively	3	7	18	24
Cumulative translation adjustment, net of income taxes of $6 and $6 for the three and six months ended March 31, 2016 and $0 and $0 for the three and six months ended March 31, 2015, respectively	(29)	66	(20)	76
Other comprehensive (loss) income	(26)	73	(2)	100
Comprehensive (loss) income	$ (129)	$ 51	$ (132)	$ 81