Fair Values of Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Jun. 30, 2017
Short-term Investments
Derivatives, Fair Value [Line Items]
Derivative Assets	$ 29	$ 100
Net amount, assets	(2)	80
Short-term Investments | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	28	100
Gross amounts of derivatives offset on the balance sheet, assets	(30)	(20)
Net amounts presented on the balance sheet, assets	(2)	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	19	20
Short-term Investments | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	5	9
Short-term Investments | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	7	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	3	5
Short-term Investments | Designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Assets	10	80
Short-term Investments | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	10	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	193	336
Net amount, assets	78	204
Other Current Assets | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	193	336
Gross amounts of derivatives offset on the balance sheet, assets	(115)	(132)
Net amounts presented on the balance sheet, assets	78	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	145	203
Other Current Assets | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	145	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	48	133
Other Current Assets | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	48	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	7	67
Net amount, assets	0	0
Equity and Other Investments | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	7	67
Gross amounts of derivatives offset on the balance sheet, assets	(7)	(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	7	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	7	67
Other Long-term Assets
Derivatives, Fair Value [Line Items]
Derivative Assets	35	6
Net amount, assets	28	(2)
Other Long-term Assets | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Assets	35	6
Gross amounts of derivatives offset on the balance sheet, assets	(7)	(8)
Net amounts presented on the balance sheet, assets	28	(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	32	6
Other Long-term Assets | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	32	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	3	0
Other Long-term Assets | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Assets	3	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	(527)	(337)
Net amount, liabilities	(425)	(341)
Other Current Liabilities | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(526)	(334)
Gross amounts of derivatives offset on the balance sheet, liabilities	152	221
Net amounts presented on the balance sheet, liabilities	(374)	(113)
Gross amounts of derivatives not offset on the balance sheet, liabilities	0	0
Cash collateral received, liabilities	(51)	(228)
Other Current Liabilities | Non-designated Hedge Derivatives
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(172)	(148)
Other Current Liabilities | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(165)	(134)
Other Current Liabilities | Non-designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(1)	(6)
Other Current Liabilities | Non-designated Hedge Derivatives | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(5)	(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	(355)	(189)
Other Current Liabilities | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(27)	(3)
Other Current Liabilities | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(328)	(186)
Other Long-term Liabilities
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(10)	(8)
Net amount, liabilities	(3)	(1)
Other Long-term Liabilities | Eligible for Offsetting
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(10)	(8)
Gross amounts of derivatives offset on the balance sheet, liabilities	7	7
Net amounts presented on the balance sheet, liabilities	(3)	(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	(5)	(8)
Other Long-term Liabilities | Non-designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(5)	(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	(5)	0
Other Long-term Liabilities | Designated Hedge Derivatives | Foreign Exchange Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	(5)	0
Other Long-term Liabilities | Designated Hedge Derivatives | Equity Contracts
Derivatives, Fair Value [Line Items]
Derivative Liabilities	$ 0	$ 0