Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2021
Loss Contingencies [Line Items]
Net benefit liability recognized for pension and other postretirement benefit plans		$ 598
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity	$ 65	$ 55
Profits Participants Litigation
Loss Contingencies [Line Items]
Litigation settlement expense	$ 58