Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 78		$ 109	$ 235	$ 337
Estimated annual amortization of intangible assets - Remainder of Fiscal Year	78			78
Estimated annual amortization of intangible assets - Year One	284			284
Estimated annual amortization of intangible assets - Year Two	260			260
Estimated annual amortization of intangible assets - Year Three	235			235
Estimated annual amortization of intangible assets - Year Four	208			208
Goodwill [Line Items]
Goodwill	6,167			6,167		$ 7,989
Goodwill, Impairment Loss				1,781
Medical
Goodwill [Line Items]
Goodwill	3,508			3,508		$ 5,330
Goodwill, Impairment Loss				1,781
Medical Unit
Goodwill [Line Items]
Goodwill	2,300			2,300
Goodwill, Impairment Loss	$ 474	$ 1,300		$ 1,800
Discount Rate, Fair Value Input	9.50%	9.00%
Terminal Growth Rate, Fair Value Input	2.00%	2.00%