Business Segment Information (Summary of Sales by Product Category) (Details) - USD ($)
$ in Millions |
3 Months Ended |
6 Months Ended |
Mar. 31, 2016 |
Mar. 31, 2015 |
Mar. 31, 2016 |
Mar. 31, 2015 |
| Business Segment Information |
|
|
|
|
| Sales: |
$ 1,311
|
$ 1,341
|
$ 2,480
|
$ 2,567
|
| Commercial Systems [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
611
|
619
|
1,173
|
1,187
|
| Government Systems [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
538
|
567
|
989
|
1,076
|
| Information Management Services [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
162
|
155
|
318
|
304
|
| Air Transport Aviation Electronics [Member] | Commercial Systems [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
355
|
355
|
682
|
693
|
| Business And Regional Aviation Electronics [Member] | Commercial Systems [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
256
|
264
|
491
|
494
|
| Avionics [Member] | Government Systems [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
357
|
371
|
650
|
698
|
| Communication and Navigation [Member] | Government Systems [Member] |
|
|
|
|
| Business Segment Information |
|
|
|
|
| Sales: |
$ 181
|
$ 196
|
$ 339
|
$ 378
|