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Restructuring and Impairment Charges and Other Income	9 Months Ended
Restructuring and Impairment Charges and Other Income	Jun. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure	Restructuring and Impairment Charges and Other Income The Company recorded $28 million of restructuring and impairment charges in the current nine-month period, primarily for severance costs. The Company recorded $94 million of other income in the current nine-month period, which included a gain from the sale of property rights and insurance proceeds related to a legal matter. In the prior-year quarter, the Company recorded a $177 million charge, net of committed insurance recoveries, in connection with the settlement of litigation.