Fair Values of Derivative Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2017	Jun. 30, 2017
Short-term Investments
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 104	$ 100
Net amount, assets	86	80
Short-term Investments | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	104	100
Gross amounts of derivatives offset on the balance sheet, assets	(18)	(20)
Net amounts presented on the balance sheet, assets	86	80
Gross amounts of derivatives not offset on the balance sheet, assets	0	0
Cash collateral received, assets	0	0
Short-term Investments | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	23	20
Short-term Investments | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	10	9
Short-term Investments | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	5	3
Short-term Investments | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	4	3
Short-term Investments | Non-designated Hedge Derivatives | Credit Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	4	5
Short-term Investments | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	81	80
Short-term Investments | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	81	80
Short-term Investments | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Current Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	182	336
Net amount, assets	90	204
Other Current Assets | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	182	336
Gross amounts of derivatives offset on the balance sheet, assets	(92)	(132)
Net amounts presented on the balance sheet, assets	90	204
Gross amounts of derivatives not offset on the balance sheet, assets	0	0
Cash collateral received, assets	0	0
Other Current Assets | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	93	203
Other Current Assets | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	93	203
Other Current Assets | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Current Assets | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Current Assets | Non-designated Hedge Derivatives | Credit Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Current Assets | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	89	133
Other Current Assets | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	89	133
Other Current Assets | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments
Derivatives, Fair Value [Line Items]
Derivative Assets	23	67
Net amount, assets	0	0
Equity and Other Investments | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	23	67
Gross amounts of derivatives offset on the balance sheet, assets	(23)	(67)
Net amounts presented on the balance sheet, assets	0	0
Gross amounts of derivatives not offset on the balance sheet, assets	0	0
Cash collateral received, assets	0	0
Equity and Other Investments | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments | Non-designated Hedge Derivatives | Credit Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	23	67
Equity and Other Investments | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Equity and Other Investments | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	23	67
Other Long-term Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	20	6
Net amount, assets	13	(2)
Other Long-term Assets | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	20	6
Gross amounts of derivatives offset on the balance sheet, assets	(7)	(8)
Net amounts presented on the balance sheet, assets	13	(2)
Gross amounts of derivatives not offset on the balance sheet, assets	0	0
Cash collateral received, assets	0	0
Other Long-term Assets | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	14	6
Other Long-term Assets | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	14	6
Other Long-term Assets | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Long-term Assets | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Long-term Assets | Non-designated Hedge Derivatives | Credit Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Long-term Assets | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	6	0
Other Long-term Assets | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	6	0
Other Long-term Assets | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	0	0
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(448)	(337)
Net amount, liabilities	(445)	(341)
Other Current Liabilities | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(444)	(334)
Gross amounts of derivatives offset on the balance sheet, liabilities	133	221
Net amounts presented on the balance sheet, liabilities	(311)	(113)
Gross amounts of derivatives not offset on the balance sheet, liabilities	0	0
Cash collateral received, liabilities	(134)	(228)
Other Current Liabilities | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(108)	(148)
Other Current Liabilities | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(83)	(134)
Other Current Liabilities | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(16)	(6)
Other Current Liabilities | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(8)	(7)
Other Current Liabilities | Non-designated Hedge Derivatives | Credit Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(1)	(1)
Other Current Liabilities | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(340)	(189)
Other Current Liabilities | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(3)	(3)
Other Current Liabilities | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(337)	(186)
Other Long-term Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(7)	(8)
Net amount, liabilities	0	(1)
Other Long-term Liabilities | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(7)	(8)
Gross amounts of derivatives offset on the balance sheet, liabilities	7	7
Net amounts presented on the balance sheet, liabilities	0	(1)
Gross amounts of derivatives not offset on the balance sheet, liabilities	0	0
Cash collateral received, liabilities	0	0
Other Long-term Liabilities | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(7)	(8)
Other Long-term Liabilities | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(7)	(8)
Other Long-term Liabilities | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Other Long-term Liabilities | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Other Long-term Liabilities | Non-designated Hedge Derivatives | Credit Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Other Long-term Liabilities | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Other Long-term Liabilities | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	0	0
Other Long-term Liabilities | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 0	$ 0