v3.8.0.1
Fair Values of Derivative Instruments (Detail) - USD ($)
$ in Millions
Mar. 31, 2018
Jun. 30, 2017
Short-term Investments    
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 36 $ 100
Net amount, assets (3) 80
Short-term Investments | Eligible for Offsetting    
Derivatives, Fair Value [Line Items]    
Derivative Assets 31 100
Gross amounts of derivatives offset on the balance sheet, assets (34) (20)
Net amounts presented on the balance sheet, assets (3) 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 26 20
Short-term Investments | Non-designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 3 9
Short-term Investments | Non-designated Hedge Derivatives | Equity Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 4 3
Short-term Investments | Non-designated Hedge Derivatives | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 15 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 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 138 336
Net amount, assets 36 204
Other Current Assets | Eligible for Offsetting    
Derivatives, Fair Value [Line Items]    
Derivative Assets 138 336
Gross amounts of derivatives offset on the balance sheet, assets (102) (132)
Net amounts presented on the balance sheet, assets 36 204
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 67 203
Other Current Assets | Non-designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 67 203
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 71 133
Other Current Assets | Designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 71 133
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 12 67
Net amount, assets 0 0
Equity and Other Investments | Eligible for Offsetting    
Derivatives, Fair Value [Line Items]    
Derivative Assets 12 67
Gross amounts of derivatives offset on the balance sheet, assets (12) (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 12 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 12 67
Other Long-term Assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 65 6
Net amount, assets 56 (2)
Other Long-term Assets | Eligible for Offsetting    
Derivatives, Fair Value [Line Items]    
Derivative Assets 65 6
Gross amounts of derivatives offset on the balance sheet, assets (9) (8)
Net amounts presented on the balance sheet, assets 56 (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 59 6
Other Long-term Assets | Non-designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 59 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 (313) (337)
Net amount, liabilities (224) (341)
Other Current Liabilities | Eligible for Offsetting    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (313) (334)
Gross amounts of derivatives offset on the balance sheet, liabilities 150 221
Net amounts presented on the balance sheet, liabilities (163) (113)
Gross amounts of derivatives not offset on the balance sheet, liabilities 0 0
Cash collateral received, liabilities (61) (228)
Other Current Liabilities | Non-designated Hedge Derivatives    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (148) (148)
Other Current Liabilities | Non-designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (142) (134)
Other Current Liabilities | Non-designated Hedge Derivatives | Equity Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (4) (6)
Other Current Liabilities | Non-designated Hedge Derivatives | Interest Rate Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (2) (7)
Other Current Liabilities | Non-designated Hedge Derivatives | Credit Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities 0 (1)
Other Current Liabilities | Designated Hedge Derivatives    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (165) (189)
Other Current Liabilities | Designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (70) (3)
Other Current Liabilities | Designated Hedge Derivatives | Equity Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (95) (186)
Other Long-term Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (15) (8)
Net amount, liabilities (6) (1)
Other Long-term Liabilities | Eligible for Offsetting    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (15) (8)
Gross amounts of derivatives offset on the balance sheet, liabilities 9 7
Net amounts presented on the balance sheet, liabilities (6) (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 (9) (8)
Other Long-term Liabilities | Non-designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (9) (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 (6) 0
Other Long-term Liabilities | Designated Hedge Derivatives | Foreign Exchange Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (6) 0
Other Long-term Liabilities | Designated Hedge Derivatives | Equity Contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities $ 0 $ 0