Fair Values of Derivative Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2018	Jun. 30, 2018
Derivatives Fair Value [Line Items]
Derivative Assets	$ 391	$ 538
Gross amounts of derivatives offset in the balance sheet, assets	(101)	(152)
Cash collateral received, assets	0	0
Net amounts of derivatives, assets	290	386
Derivative Liabilities	(129)	(207)
Gross amounts of derivatives offset in the balance sheet, liabilities	100	153
Cash collateral received, liabilities	(168)	(235)
Net amounts of derivatives, liabilities	(197)	(289)
Level 1
Derivatives Fair Value [Line Items]
Derivative Assets	1	1
Derivative Liabilities	(1)	(1)
Level 2
Derivatives Fair Value [Line Items]
Derivative Assets	387	535
Derivative Liabilities	(128)	(206)
Level 3
Derivatives Fair Value [Line Items]
Derivative Assets	3	2
Derivative Liabilities	0	0
Designated as Hedging Instruments \| Foreign Exchange Contracts \| Cash Flow Hedges
Derivatives Fair Value [Line Items]
Derivative Assets	151	174
Derivative Liabilities	0	0
Designated as Hedging Instruments \| Foreign Exchange Contracts \| Fair Value Hedges
Derivatives Fair Value [Line Items]
Derivative Assets	97	95
Derivative Liabilities	0	0
Not Designated as Hedging Instruments \| Foreign Exchange Contracts
Derivatives Fair Value [Line Items]
Derivative Assets	129	256
Derivative Liabilities	(118)	(197)
Not Designated as Hedging Instruments \| Equity Contracts
Derivatives Fair Value [Line Items]
Derivative Assets	5	2
Derivative Liabilities	(3)	(7)
Not Designated as Hedging Instruments \| Other Contracts
Derivatives Fair Value [Line Items]
Derivative Assets	9	11
Derivative Liabilities	(8)	(3)
Short-term Investments
Derivatives Fair Value [Line Items]
Net amounts of derivatives, assets	109	104
Other Current Assets
Derivatives Fair Value [Line Items]
Net amounts of derivatives, assets	161	260
Other Long-term Assets
Derivatives Fair Value [Line Items]
Net amounts of derivatives, assets	20	22
Other Current Liabilities
Derivatives Fair Value [Line Items]
Net amounts of derivatives, liabilities	(194)	(288)
Other Long-term Liabilities
Derivatives Fair Value [Line Items]
Net amounts of derivatives, liabilities	$ (3)	$ (1)

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and elected not to be offset.

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