Divestitures (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended	6 Months Ended	9 Months Ended
	Feb. 01, 2018	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale of business, consideration	$ 1,200
Proceeds from Divestiture of Businesses	$ 861
China Business | Disposal Group, Held-for-sale, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, impairment			$ 67
Provisional tax expense, disposal group				$ 57
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ 7		$ (60)