Discontinued Operations Discontinued Operations - Assets and Liabilities Held for Sale, Specific Transactions (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Assets and Liabilities Held for Sale, Specific Transactions [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
Interiors
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Cash and cash equivalents	0	0
Accounts receivable - net	583	596
Inventories	219	209
Other current assets	175	174
Property, plant and equipment - net	583	496
Goodwill	21	12
Other intangible assets - net	3	4
Investments in partially-owned affiliates	58	83
Other noncurrent assets	36	35
Disposal Group, Including Discontinued Operation, Assets	1,678	1,609
Short-term debt	18	0
Accounts payable	633	655
Accrued compensation and benefits	42	24
Other current liabilities	165	154
Liabilities held for sale	858	833
Global Workplace Solutions
Assets and Liabilities Held for Sale, Specific Transactions [Line Items]
Cash and cash equivalents	0	20
Accounts receivable - net	582	723
Inventories	6	9
Other current assets	80	57
Property, plant and equipment - net	26	34
Goodwill	216	253
Other intangible assets - net	18	35
Investments in partially-owned affiliates	0	0
Other noncurrent assets	56	47
Disposal Group, Including Discontinued Operation, Assets	984	1,178
Short-term debt	1	3
Accounts payable	425	591
Accrued compensation and benefits	71	128
Other current liabilities	156	246
Liabilities held for sale	$ 653	$ 968