Inventories (Details) - USD ($) $ in Millions		Mar. 31, 2018	Sep. 30, 2017
Inventory Disclosure [Abstract]
Finished goods		$ 168	$ 139
Work in process		35	34
Raw materials, parts and supplies		252	205
Total inventories	[1]	$ 455	$ 378

[1] As of March 31, 2018, Assets and liabilities held for sale consisted of $3 million Net property. As of September 30, 2017, Assets and liabilities held for sale were: (i) $1 million Cash and cash equivalents; (ii) $13 million Receivables, trade and other, net; (iii) $2 million Inventories; (iv) $3 million Net property; (v) $1 million Goodwill; (vi) $1 million Other assets; (vii) $12 million Accounts and notes payable; and (viii) $2 million Noncontrolling interests.