Condensed Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Net Income (Loss) Attributable to Parent [Abstract]
Sales	$ 578	$ 591	$ 1,185	$ 1,148
Cost of sales	371	388	767	762
Gross profit	207	203	418	386
Selling, general and administrative expenses	96	113	213	218
Net legacy and separation-related expenses (income)	0	3	(1)	3
Equity and other income, net	(6)	(9)	(15)	(18)
Operating income	117	96	221	183
Net pension and other postretirement plan income	(9)	(3)	(18)	(5)
Net interest and other financing expenses	38	19	54	36
Income before income taxes	88	80	185	152
Income tax expense	25	17	49	36
Net income	$ 63	$ 63	$ 136	$ 116
NET EARNINGS PER SHARE
Basic (usd per share)	$ 0.33	$ 0.33	$ 0.72	$ 0.61
Diluted (usd per share)	$ 0.33	$ 0.33	$ 0.72	$ 0.61
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic (shares)	188	189	188	189
Diluted (shares)	188	189	189	189
COMPREHENSIVE INCOME
Net income	$ 63	$ 63	$ 136	$ 116
Other comprehensive (loss) income, net of tax
Currency translation adjustments	(21)	2	(13)	(2)
Amortization of pension and other postretirement plan prior service credit	(2)	(2)	(4)	(4)
Other comprehensive loss	(23)	0	(17)	(6)
Comprehensive income	$ 40	$ 63	$ 119	$ 110