Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Aug. 31, 2012	May 31, 2012
Assets
Derivative assets	$ 167	$ 281
Fair Value, Measurements, Recurring
Assets
Derivative assets	167	281
Available-for-sale securities	2,208	2,852
Total Assets	2,375	3,133
LIABILITIES
Total Liabilities	58	55
Fair Value, Measurements, Recurring | U.S. Treasury securities | Cash and equivalents
Assets
Available-for-sale securities	519	226
Fair Value, Measurements, Recurring | U.S. Treasury securities | Short-term investments
Assets
Available-for-sale securities	633	927
Fair Value, Measurements, Recurring | U.S. Agency securities | Cash and equivalents
Assets
Available-for-sale securities		254
Fair Value, Measurements, Recurring | U.S. Agency securities | Short-term investments
Assets
Available-for-sale securities	229	230
Fair Value, Measurements, Recurring | Commercial paper and bonds | Cash and equivalents
Assets
Available-for-sale securities	243	159
Fair Value, Measurements, Recurring | Commercial paper and bonds | Short-term investments
Assets
Available-for-sale securities	240	283
Fair Value, Measurements, Recurring | Money market funds | Cash and equivalents
Assets
Available-for-sale securities	341	770
Fair Value, Measurements, Recurring | Non-marketable preferred stock | Other long-term assets
Assets
Available-for-sale securities	3	3
Fair Value, Measurements, Recurring | Foreign exchange forwards and options | Other current assets and other long-term assets
Assets
Derivative assets	153	265
Fair Value, Measurements, Recurring | Foreign exchange forwards and options | Accrued liabilities and other long-term liabilities
LIABILITIES
Derivative liabilities	58	55
Fair Value, Measurements, Recurring | Embedded derivatives | Other current assets
Assets
Derivative assets		1
Fair Value, Measurements, Recurring | Interest rate swap contracts | Other current assets and other long-term assets
Assets
Derivative assets	14	15
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1
Assets
Derivative assets	0	0
Available-for-sale securities	1,152	1,153
Total Assets	1,152	1,153
LIABILITIES
Total Liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Treasury securities | Cash and equivalents
Assets
Available-for-sale securities	519	226
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Treasury securities | Short-term investments
Assets
Available-for-sale securities	633	927
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Agency securities | Cash and equivalents
Assets
Available-for-sale securities		0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Agency securities | Short-term investments
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Commercial paper and bonds | Cash and equivalents
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Commercial paper and bonds | Short-term investments
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Money market funds | Cash and equivalents
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Non-marketable preferred stock | Other long-term assets
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Foreign exchange forwards and options | Other current assets and other long-term assets
Assets
Derivative assets	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Foreign exchange forwards and options | Accrued liabilities and other long-term liabilities
LIABILITIES
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Embedded derivatives | Other current assets
Assets
Derivative assets		0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Interest rate swap contracts | Other current assets and other long-term assets
Assets
Derivative assets	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2
Assets
Derivative assets	167	281
Available-for-sale securities	1,053	1,696
Total Assets	1,220	1,977
LIABILITIES
Total Liabilities	58	55
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | U.S. Treasury securities | Cash and equivalents
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | U.S. Treasury securities | Short-term investments
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | U.S. Agency securities | Cash and equivalents
Assets
Available-for-sale securities		254
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | U.S. Agency securities | Short-term investments
Assets
Available-for-sale securities	229	230
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Commercial paper and bonds | Cash and equivalents
Assets
Available-for-sale securities	243	159
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Commercial paper and bonds | Short-term investments
Assets
Available-for-sale securities	240	283
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Money market funds | Cash and equivalents
Assets
Available-for-sale securities	341	770
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Non-marketable preferred stock | Other long-term assets
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Foreign exchange forwards and options | Other current assets and other long-term assets
Assets
Derivative assets	153	265
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Foreign exchange forwards and options | Accrued liabilities and other long-term liabilities
LIABILITIES
Derivative liabilities	58	55
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Embedded derivatives | Other current assets
Assets
Derivative assets		1
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Interest rate swap contracts | Other current assets and other long-term assets
Assets
Derivative assets	14	15
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3
Assets
Derivative assets	0	0
Available-for-sale securities	3	3
Total Assets	3	3
LIABILITIES
Total Liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | U.S. Treasury securities | Cash and equivalents
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | U.S. Treasury securities | Short-term investments
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | U.S. Agency securities | Cash and equivalents
Assets
Available-for-sale securities		0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | U.S. Agency securities | Short-term investments
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Commercial paper and bonds | Cash and equivalents
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Commercial paper and bonds | Short-term investments
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Money market funds | Cash and equivalents
Assets
Available-for-sale securities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Non-marketable preferred stock | Other long-term assets
Assets
Available-for-sale securities	3	3
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Foreign exchange forwards and options | Other current assets and other long-term assets
Assets
Derivative assets	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Foreign exchange forwards and options | Accrued liabilities and other long-term liabilities
LIABILITIES
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Embedded derivatives | Other current assets
Assets
Derivative assets		0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Interest rate swap contracts | Other current assets and other long-term assets
Assets
Derivative assets	$ 0	$ 0