Property, Plant and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment [Line Items]
Buildings and Improvements, Gross	$ 3,435	$ 3,091
Interest costs capitalized	19	25	$ 28
Accumulated depreciation related to capital leases	40	54
Land	526	338
Lessor [Domain]
Property, Plant and Equipment [Line Items]
Buildings and Improvements, Gross	187	177
Land	21	13
Property, Plant and Equipment, Other, Accumulated Depreciation	$ 126	$ 131