Impairment of Long-Lived Assets (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2018	Jun. 30, 2017
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges					$ 30	$ 70
2018 Restructuring Plan
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges	$ 30
2018 Restructuring Plan | Global Products
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges	23
2018 Restructuring Plan | Corporate Segment
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges	5
2018 Restructuring Plan | Power Solutions
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges	$ 2
2017 Restructuring Plan
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges		$ 31	$ 23	$ 15		69
2017 Restructuring Plan | Global Products
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges						20
2017 Restructuring Plan | Corporate Segment
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges						17
2017 Restructuring Plan | Power Solutions
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges						4
2017 Restructuring Plan | Building Solutions North America
Impairment of Long Lived Assets [Line Items]
Asset Impairment Charges						$ 28