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Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Jun. 30, 2019
Income Taxes
Income Tax Expense (Benefit)	$ 423	$ (142)
Effective Income Tax Rate Reconciliation, Percent	7.90%	19.40%
Unrecognized tax benefits	$ 943		$ 456
Unrecognized tax benefits that would impact effective tax rate	795		303
Unrecognized tax benefits, interest and penalties accrued	126		122
Minimum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months	0
Maximum
Income Taxes
Estimated range of decrease in unrecognized tax benefits within the next 12 months	$ 10
Federal | Minimum
Income Taxes
Open Tax Year	2008
Total Opioid Litigation [Member]
Income Taxes
Estimated Litigation Liability	$ 5,630
Income Tax Expense (Benefit)	487
Unrecognized tax benefits that would impact effective tax rate	468
Patient Recovery Business [Member]
Income Taxes
Indemnification receivable	23		22
CareFusion [Member]
Income Taxes
Indemnification receivable	$ 168		$ 165

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