Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended					9 Months Ended
	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 69			$ 78		$ 211	$ 235
Estimated annual amortization of intangible assets - Remainder of Fiscal Year	71					71
Estimated annual amortization of intangible assets - Year One	261					261
Estimated annual amortization of intangible assets - Year Two	236					236
Estimated annual amortization of intangible assets - Year Three	209					209
Estimated annual amortization of intangible assets - Year Four	177					177
Goodwill [Line Items]
Goodwill	5,000					5,000		$ 5,855
Goodwill impairment						863
Medical
Goodwill [Line Items]
Goodwill	$ 2,327					2,327		$ 3,182
Goodwill impairment		$ 709	$ 154			863
Medical Unit
Goodwill [Line Items]
Goodwill impairment				$ 474	$ 1,300
Medical Unit
Goodwill [Line Items]
Goodwill impairment						$ 863
Discount Rate, Fair Value Input	10.00%	10.50%	10.50%			10.00%
Terminal Growth Rate, Fair Value Input	2.00%	2.00%	2.00%			2.00%
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	4.00%					4.00%