Revenue (Tables)

6 Months Ended

Mar. 31, 2021

Revenue from Contract with Customer [Abstract]

Schedule of Disaggregation of Revenue by Operating Segment

In the following tables, revenue is disaggregated for each of our operating segments by primary geographical market for the three months ended March 31, 2021 and 2020 (in millions).

	Three Months Ended March 31, 2021
Primary Geographical Market	Commercial Truck		Aftermarket & Industrial		Total
U.S.	$	337	$	177	$	514
Canada	—		14		14
Mexico	44		5		49
Total North America	381		196		577
Sweden	74		—		74
Italy	58		5		63
United Kingdom	36		3		39
Other Europe	3		35		38
Total Europe	171		43		214
Brazil	81		1		82
China	34		1		35
India	50		—		50
Other Asia-Pacific	25		—		25
Total sales	$	742	$	241	$	983

	Three Months Ended March 31, 2020 (1)
Primary Geographical Market	Commercial Truck		Aftermarket & Industrial		Total
U.S.	$	307	$	211	$	518
Canada	—		15		15
Mexico	39		5		44
Total North America	346		231		577
Sweden	63		—		63
Italy	46		3		49
United Kingdom	30		3		33
Other Europe	1		36		37
Total Europe	140		42		182
Brazil	50		—		50
China	26		—		26
India	22		—		22
Other Asia-Pacific	14		—		14
Total sales	$	598	$	273	$	871

(1) Amounts for the three months ended March 31, 2020 have been recast to reflect reportable segment changes.

	Six Months Ended March 31, 2021
Primary Geographical Market	Commercial Truck		Aftermarket & Industrial		Total
U.S.	$	647	$	347	$	994
Canada	—		26		26
Mexico	80		10		90
Total North America	727		383		1,110
Sweden	151		—		151
Italy	111		10		121
United Kingdom	77		5		82
Other Europe	5		70		75
Total Europe	344		85		429
Brazil	137		1		138
China	64		1		65
India	83		—		83
Other Asia-Pacific	47		—		47
Total sales	$	1,402	$	470	$	1,872

	Six Months Ended March 31, 2020 (1)
Primary Geographical Market	Commercial Truck		Aftermarket & Industrial		Total
U.S.	$	635	$	417	$	1,052
Canada	—		29		29
Mexico	78		10		88
Total North America	713		456		1,169
Sweden	125		—		125
Italy	91		7		98
United Kingdom	63		5		68
Other Europe	2		73		75
Total Europe	281		85		366
Brazil	103		1		104
China	60		—		60
India	44		1		45
Other Asia-Pacific	28		—		28
Total sales	$	1,229	$	543	$	1,772

(1) Amounts for the six months ended March 31, 2020 have been recast to reflect reportable segment changes.