Discontinued Operations Discontinued Operations - Assets and Liabilities Held for Sale (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014
Assets and Liabilities Held for Sale [Line Items]
Cash and cash equivalents	$ 0	$ 20
Accounts receivable - net	1,165	1,319
Inventories	225	218
Other current assets	255	231
Property, plant and equipment - net	609	530
Goodwill	237	265
Other intangible assets - net	21	39
Investments in partially-owned affiliates	58	83
Other noncurrent assets	92	82
Disposal Group, Including Discontinued Operation, Assets	2,662	2,787
Short-term debt	19	3
Accounts payable	1,058	1,246
Accrued compensation and benefits	113	152
Other current liabilities	321	400
Liabilities held for sale	1,511	1,801
Electronics and Headliner & Sun Visor
Assets and Liabilities Held for Sale [Line Items]
Cash and cash equivalents			3
Accounts receivable - net			214
Inventories			128
Other current assets			63
Property, plant and equipment - net			174
Goodwill			74
Other intangible assets - net			62
Investments in partially-owned affiliates			31
Other noncurrent assets			67
Disposal Group, Including Discontinued Operation, Assets			816
Short-term debt			5
Accounts payable			248
Accrued compensation and benefits			35
Other current liabilities			32
Pension and postretirement benefits			11
Other noncurrent liabilities			2
Liabilities held for sale			$ 333