Acquisitions (Narrative) (Details) $ in Millions		1 Months Ended	3 Months Ended
	Jul. 29, 2017 USD ($) category country	Jun. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Business Acquisition [Line Items]
Cash paid for acquisitions, net of cash acquired			$ 6,139	$ 9
Patient Recovery Business [Member]
Business Acquisition [Line Items]
Prepaid expenses and other			106
Cash paid for acquisitions, net of cash acquired	$ 6,100
Number of Product Categories Manufactured | category	23
Number of principal countries | country	28
Proceeds from Issuance of Debt		$ 4,500
Transaction and integration costs			$ 37
Level 3 | Patient Recovery Business [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Discount Rate	8.20%