Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified
Feb. 28, 2014
May 31, 2013
Assets    
Derivative assets $ 128 $ 289
Available-for-sale Securities 3,165 2,628
Commercial paper and bonds
    
Assets    
Available-for-sale Securities 823 414
Fair Value, Measurements, Recurring
    
Assets    
Derivative assets 128 289
Available-for-sale Securities 4,191 4,949
Total Assets 4,319 5,238
Liabilities    
Total Liabilities 117 34
Reduction in derivative liabilities if netted 70 34
Reduction in derivative assets if netted 70 34
Fair Value, Measurements, Recurring | U.S. Treasury securities | Cash and equivalents
    
Assets    
Available-for-sale Securities 0 425
Fair Value, Measurements, Recurring | U.S. Treasury securities | Short-term investments
    
Assets    
Available-for-sale Securities 1,474 1,583
Fair Value, Measurements, Recurring | U.S. Agency securities | Cash and equivalents
    
Assets    
Available-for-sale Securities 0 395 [1]
Fair Value, Measurements, Recurring | U.S. Agency securities | Short-term investments
    
Assets    
Available-for-sale Securities 868 631 [1]
Fair Value, Measurements, Recurring | Commercial paper and bonds | Cash and equivalents
    
Assets    
Available-for-sale Securities 150 660 [1]
Fair Value, Measurements, Recurring | Commercial paper and bonds | Short-term investments
    
Assets    
Available-for-sale Securities 823 414 [1]
Fair Value, Measurements, Recurring | Money market funds | Cash and equivalents
    
Assets    
Available-for-sale Securities 870 836
Fair Value, Measurements, Recurring | Non-marketable preferred stock | Other Assets
    
Assets    
Available-for-sale Securities 6 5
Fair Value, Measurements, Recurring | Foreign exchange forwards and options | Other Assets
    
Assets    
Derivative assets 120 [2] 278 [3]
Fair Value, Measurements, Recurring | Foreign exchange forwards and options | Other Liabilities
    
Liabilities    
Derivative liabilities 116 [2] 34 [3]
Fair Value, Measurements, Recurring | Interest rate swap contracts | Other Assets
    
Assets    
Derivative assets 7 11
Fair Value, Measurements, Recurring | Embedded derivatives | Other Assets
    
Assets    
Derivative assets 1  
Fair Value, Measurements, Recurring | Embedded derivatives | Accrued liabilities
    
Liabilities    
Derivative liabilities 1  
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1
    
Assets    
Derivative assets 0 0
Available-for-sale Securities 1,474 2,008
Total Assets 1,474 2,008
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 0 425
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Treasury securities | Short-term investments
    
Assets    
Available-for-sale Securities 1,474 1,583
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Agency securities | Cash and equivalents
    
Assets    
Available-for-sale Securities 0 0 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | U.S. Agency securities | Short-term investments
    
Assets    
Available-for-sale Securities 0 0 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Commercial paper and bonds | Cash and equivalents
    
Assets    
Available-for-sale Securities 0 0 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Commercial paper and bonds | Short-term investments
    
Assets    
Available-for-sale Securities 0 0 [1]
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 Assets
    
Assets    
Available-for-sale Securities 0 0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Foreign exchange forwards and options | Other Assets
    
Assets    
Derivative assets 0 [2] 0 [3]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Foreign exchange forwards and options | Other Liabilities
    
Liabilities    
Derivative liabilities 0 [2] 0 [3]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Interest rate swap contracts | Other Assets
    
Assets    
Derivative assets 0 0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Embedded derivatives | Other Assets
    
Assets    
Derivative assets 0  
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 1 | Embedded derivatives | Accrued liabilities
    
Liabilities    
Derivative liabilities 0  
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2
    
Assets    
Derivative assets 128 289
Available-for-sale Securities 2,711 2,936
Total Assets 2,839 3,225
Liabilities    
Total Liabilities 117 34
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 0 395 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | U.S. Agency securities | Short-term investments
    
Assets    
Available-for-sale Securities 868 631 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Commercial paper and bonds | Cash and equivalents
    
Assets    
Available-for-sale Securities 150 660 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Commercial paper and bonds | Short-term investments
    
Assets    
Available-for-sale Securities 823 414 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Money market funds | Cash and equivalents
    
Assets    
Available-for-sale Securities 870 836
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Non-marketable preferred stock | Other Assets
    
Assets    
Available-for-sale Securities 0 0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Foreign exchange forwards and options | Other Assets
    
Assets    
Derivative assets 120 [2] 278 [3]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Foreign exchange forwards and options | Other Liabilities
    
Liabilities    
Derivative liabilities 116 [2] 34 [3]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Interest rate swap contracts | Other Assets
    
Assets    
Derivative assets 7 11
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Embedded derivatives | Other Assets
    
Assets    
Derivative assets 1  
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 2 | Embedded derivatives | Accrued liabilities
    
Liabilities    
Derivative liabilities 1  
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3
    
Assets    
Derivative assets 0 0
Available-for-sale Securities 6 5
Total Assets 6 5
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 0 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | U.S. Agency securities | Short-term investments
    
Assets    
Available-for-sale Securities 0 0 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Commercial paper and bonds | Cash and equivalents
    
Assets    
Available-for-sale Securities 0 0 [1]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Commercial paper and bonds | Short-term investments
    
Assets    
Available-for-sale Securities 0 0 [1]
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 Assets
    
Assets    
Available-for-sale Securities 6 5
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Foreign exchange forwards and options | Other Assets
    
Assets    
Derivative assets 0 [2] 0 [3]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Foreign exchange forwards and options | Other Liabilities
    
Liabilities    
Derivative liabilities 0 [2] 0 [3]
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Interest rate swap contracts | Other Assets
    
Assets    
Derivative assets 0 0
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Embedded derivatives | Other Assets
    
Assets    
Derivative assets 0  
Fair Value, Measurements, Recurring | Fair Value Measurements Using Level 3 | Embedded derivatives | Accrued liabilities
    
Liabilities    
Derivative liabilities $ 0  
[1] Amounts have been revised to reflect proper classification between U.S. Agency securities and commercial paper and bonds.
[2] The Company’s derivative financial instruments are subject to master netting arrangements that allow for the offset of assets and liabilities in the event of default or early termination of the contract. The Company elects to record the gross assets and liabilities of its derivative financial instruments in the consolidated balance sheets. If the derivative financial instruments had been netted in the consolidated balance sheets, the asset and liability positions each would have been reduced by $70 million. No material amounts of collateral were received or posted on the Company’s derivative assets and liabilities as of February 28, 2014.
[3] The Company’s derivative financial instruments are subject to master netting arrangements that allow for the offset of assets and liabilities in the event of default or early termination of the contract. The Company elects to record the gross assets and liabilities of its derivative financial instruments in the consolidated balance sheets. If the derivative financial instruments had been netted in the consolidated balance sheets, the asset and liability positions each would have been reduced by $34 million. No material amounts of collateral were received or posted on the Company’s derivative assets and liabilities as of May 31, 2013.