Supplemental Cash Flow Information (Supplemental Cash Flow Disclosure Related To Leases) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2020	Mar. 31, 2020
Supplemental Cash Flow Information [Abstract]
Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases	$ 876	$ 2,904
Right-of-use assets obtained in exchange for lease obligations: Operating leases	$ 484	$ 2,974