Acquisitions (Schedule of Estimated Fair Values of the Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Oct. 02, 2015	Aug. 26, 2015	Jul. 02, 2015	Jun. 30, 2015
Business Acquisition [Line Items]
Goodwill	$ 7,221	$ 7,167				$ 5,070
Customer relationships | Minimum
Business Acquisition [Line Items]
Weighted average used lives of intangibles	4 years
Customer relationships | Maximum
Business Acquisition [Line Items]
Weighted average used lives of intangibles	13 years
Trade names | Minimum
Business Acquisition [Line Items]
Weighted average used lives of intangibles	10 years
Trade names | Maximum
Business Acquisition [Line Items]
Weighted average used lives of intangibles	20 years
Developed technology
Business Acquisition [Line Items]
Weighted average used lives of intangibles	10 years
Cordis
Business Acquisition [Line Items]
Total identifiable intangible assets acquired			$ 800
Cash and equivalents			0
Trade receivables			0
Inventories			205
Prepaid expenses and other			4
Property and equipment			97
Other assets			44
Accounts payable			(82)
Other accrued liabilities			(85)
Deferred income taxes and other liabilities			(13)
Redeemable noncontrolling interests			0
Total identifiable net assets/(liabilities) acquired			970
Goodwill			914
Total net assets acquired			1,884
Cordis | In-process research and development
Business Acquisition [Line Items]
Indefinite-lived intangible assets			55
Cordis | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets			225
Cordis | Trade names
Business Acquisition [Line Items]
Finite-lived intangible assets			125
Cordis | Developed technology
Business Acquisition [Line Items]
Finite-lived intangible assets			$ 395
naviHealth
Business Acquisition [Line Items]
Total identifiable intangible assets acquired				$ 115
Cash and equivalents				53
Trade receivables				31
Inventories				0
Prepaid expenses and other				14
Property and equipment				5
Other assets				1
Accounts payable				(2)
Other accrued liabilities				(95)
Deferred income taxes and other liabilities				(33)
Redeemable noncontrolling interests				(119)
Total identifiable net assets/(liabilities) acquired				(30)
Goodwill				321
Total net assets acquired				291
naviHealth | In-process research and development
Business Acquisition [Line Items]
Indefinite-lived intangible assets				0
naviHealth | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets				38
naviHealth | Trade names
Business Acquisition [Line Items]
Finite-lived intangible assets				16
naviHealth | Developed technology
Business Acquisition [Line Items]
Finite-lived intangible assets				$ 61
Harvard Drug
Business Acquisition [Line Items]
Total identifiable intangible assets acquired					$ 600
Cash and equivalents					44
Trade receivables					67
Inventories					49
Prepaid expenses and other					11
Property and equipment					16
Other assets					0
Accounts payable					(47)
Other accrued liabilities					(37)
Deferred income taxes and other liabilities					(188)
Redeemable noncontrolling interests					0
Total identifiable net assets/(liabilities) acquired					515
Goodwill					634
Total net assets acquired					1,149
Harvard Drug | In-process research and development
Business Acquisition [Line Items]
Indefinite-lived intangible assets					0
Harvard Drug | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangible assets					470
Harvard Drug | Trade names
Business Acquisition [Line Items]
Finite-lived intangible assets					130
Harvard Drug | Developed technology
Business Acquisition [Line Items]
Finite-lived intangible assets					$ 0