CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014		Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Sales	$ 864	$ 954		$ 1,743	$ 1,854
Cost of sales	(749)	(836)		(1,513)	(1,631)
GROSS MARGIN	115	118		230	223
Selling, general and administrative	(57)	(66)		(122)	(125)
Restructuring costs	(3)	(2)	[1]	(6)	(3)
Other operating income (expense), net	0	0		1	(1)
OPERATING INCOME (LOSS)	55	50		103	94
Other income, net	2	0		4	0
Equity in earnings of affiliates	9	9		18	17
Interest expense, net	(21)	(48)	[1]	(40)	(75)
INCOME BEFORE INCOME TAXES	45	11		85	36
Provision for income taxes	(6)	(8)	[1]	(13)	(19)
INCOME FROM CONTINUING OPERATIONS	39	3		72	17
INCOME (LOSS) FROM DISCONTINUED OPERATIONS, net of tax	4	0		1	(1)
NET INCOME	43	3		73	16
Less: Net income attributable to noncontrolling interests	0	(2)	[1]	(1)	(4)
Net income	43	1		72	12
NET INCOME ATTRIBUTABLE TO MERITOR, INC.
Net income from continuing operations	39	1	[1]	71	13
Income (loss) from discontinued operations	4	0		1	(1)
Net income	$ 43	$ 1		$ 72	$ 12
BASIC EARNINGS (LOSS) PER SHARE
Continuing operations (in dollars per share)	$ 0.40	$ 0.01		$ 0.73	$ 0.13
Discontinued operations (in dollars per share)	$ 0.04	$ 0.00		$ 0.01	$ (0.01)
Basic earnings per share (in dollars per share)	$ 0.44	$ 0.01		$ 0.74	$ 0.12
DILUTED EARNINGS (LOSS) PER SHARE
Continuing operations (in dollars per share)	$ 0.38	$ 0.01		$ 0.70	$ 0.13
Discontinued operations (in dollars per share)	$ 0.04	$ 0.00		$ 0.01	$ (0.01)
Diluted earnings per share (in dollars per share)	$ 0.42	$ 0.01		$ 0.71	$ 0.12
Basic average common shares outstanding (in shares)	97.9	97.6		97.9	97.5
Diluted average common shares outstanding (in shares)	102.9	99.6		102.0	99.2

[1] Amounts for prior periods have been recast for discontinued operations.