Financial Instruments (Tables)

9 Months Ended

Mar. 31, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Estimated Fair Value of Long-term Obligations and Other Short-term Borrowings Compared to the Respective Carrying Amount

The following table summarizes the estimated fair value of our long-term obligations and other short-term borrowings compared to the respective carrying amounts at:

(in millions)	March 31, 2019		June 30, 2018
Estimated fair value	$	8,925	$	8,852
Carrying amount	9,080		9,013