Goodwill and Other Intangible Assets - Goodwill Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Goodwill [Line Items]
Goodwill impairment loss	$ 47	$ 0
Goodwill	7,127	6,850	$ 7,658
Interiors
Goodwill [Line Items]
Accumulated goodwill impairment			430
Goodwill impairment loss		0
Goodwill	0	0
Building Efficiency Other
Goodwill [Line Items]
Goodwill impairment loss	47	0
Goodwill	1,788	1,777	$ 1,942
Latin America | Building Efficiency Other
Goodwill [Line Items]
Goodwill impairment loss	47
Goodwill	$ 0
Middle East | Building Efficiency Other
Goodwill [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	9.00%
Goodwill		$ 85