Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 127	$ 133	$ 256	$ 266
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	258		258
Estimated annual amortization of intangible assets - Year Two	442		442
Estimated annual amortization of intangible assets - Year Three	408		408
Estimated annual amortization of intangible assets - Year Four	358		358
Estimated annual amortization of intangible assets - Year Five	$ 328		$ 328