Fair Value Measurements, Derivative Instruments and Hedging Activities - Additional Information (Detail)	3 Months Ended						1 Months Ended
	Feb. 28, 2013 USD ($)	Feb. 29, 2012 USD ($)	Nov. 30, 2012 USD ($)	Feb. 28, 2013 Foreign Currency Intercompany Payable USD ($)	Nov. 30, 2012 Foreign Currency Intercompany Payable USD ($)	Feb. 28, 2013 Minimum USD ($)	Jul. 31, 2012 Cash Flow Hedging	Jul. 31, 2012 Cash Flow Hedging	Jun. 30, 2012 Cash Flow Hedging	Jul. 31, 2012 Cash Flow Hedging Minimum USD ($)	Jun. 30, 2012 Cash Flow Hedging Minimum USD ($)	Jul. 31, 2012 Cash Flow Hedging Maximum USD ($)	Jun. 30, 2012 Cash Flow Hedging Maximum USD ($)
Fair Value, Measurement Inputs, Disclosure [Line Items]
Accumulated goodwill impairment charges	$ 153,000,000
Derivative asset, cash collateral netting threshold, fair value						100,000,000
Designated debt and other obligations as non-derivative hedges of net investments in foreign operations				1,700,000,000	1,800,000,000
Cumulative foreign currency transaction gains and (losses) included in the cumulative translation adjustment component of AOCI	332,000,000		243,000,000
Foreign currency translation adjustment	89,000,000	(60,000,000)
Maturity period for foreign currency zero cost collars							2015-02	2015-02	2013-05
Weighted-Average ceiling rate							0.83	0.83	1.30
Currency exchange risk hedged										257,000,000	512,000,000	277,000,000	560,000,000
Weighted-Average floor rate							0.77	0.77	1.19
Foreign currency contract commitments	$ 1,100,000,000
Percentage of debt bore fixed interest rates, including the effect of interest rate swaps	63.00%		61.00%
Percentage of debt bore floating interest rates, including the effect of interest rate swaps	37.00%		39.00%