Financial Instruments and Fair Value Measurements - Summary of Assets and Liabilities Measured At Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Jun. 30, 2021
Assets:
Equity securities	$ 285	$ 280
Fair Value, Recurring
Assets:
Equity securities	285	280
Total assets	383	371
Liabilities:
Total liabilities	7	22
Fair Value, Recurring | Interest rate derivatives | Cash Flow Hedging
Assets:
Derivative assets	11	0
Liabilities:
Derivative liabilities	3	9
Fair Value, Recurring | Cross currency interest rate derivatives
Assets:
Derivative assets	70	73
Liabilities:
Derivative liabilities	4	13
Fair Value, Recurring | Cross currency interest rate derivatives | Fair Value Hedging
Assets:
Derivative assets	17	18
Fair Value, Recurring | Level 1
Assets:
Equity securities	180	164
Total assets	180	164
Liabilities:
Total liabilities	0	0
Fair Value, Recurring | Level 1 | Interest rate derivatives | Cash Flow Hedging
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 1 | Cross currency interest rate derivatives
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 1 | Cross currency interest rate derivatives | Fair Value Hedging
Assets:
Derivative assets	0	0
Fair Value, Recurring | Level 2
Assets:
Equity securities	0	0
Total assets	98	91
Liabilities:
Total liabilities	7	22
Fair Value, Recurring | Level 2 | Interest rate derivatives | Cash Flow Hedging
Assets:
Derivative assets	11	0
Liabilities:
Derivative liabilities	3	9
Fair Value, Recurring | Level 2 | Cross currency interest rate derivatives
Assets:
Derivative assets	70	73
Liabilities:
Derivative liabilities	4	13
Fair Value, Recurring | Level 2 | Cross currency interest rate derivatives | Fair Value Hedging
Assets:
Derivative assets	17	18
Fair Value, Recurring | Level 3
Assets:
Equity securities	105	116
Total assets	105	116
Liabilities:
Total liabilities	0	0
Fair Value, Recurring | Level 3 | Interest rate derivatives | Cash Flow Hedging
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 3 | Cross currency interest rate derivatives
Assets:
Derivative assets	0	0
Liabilities:
Derivative liabilities	0	0
Fair Value, Recurring | Level 3 | Cross currency interest rate derivatives | Fair Value Hedging
Assets:
Derivative assets	$ 0	$ 0