Fair Value Measurements, Derivative Instruments and Hedging Activities - Estimated Fair Values of Derivative Financial Instruments and Location on Consolidated Balance Sheets (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified			1 Months Ended		6 Months Ended			6 Months Ended
	May 31, 2013 Net investment hedges	Nov. 30, 2012 Net investment hedges	Jul. 31, 2012 Cash Flow Hedging	Jun. 30, 2012 Cash Flow Hedging	May 31, 2013 Cash Flow Hedging Interest rate swaps	Nov. 30, 2012 Cash Flow Hedging Interest rate swaps	May 31, 2013 Fair Value Hedging Interest rate swaps	May 31, 2013 Fair Value Hedging Interest rate swaps US Dollar	May 31, 2013 Fair Value Hedging Interest rate swaps Sterling	May 31, 2013 Maturing in July 2017 Net investment hedges
Derivatives, Fair Value [Line Items]
Foreign currency forwards designated as hedges of net investments in foreign operations for euro-denominated functional currency	$ 128	$ 235
Maturity date of derivative instruments			2015-02	2013-05	2022-02			2012-02	2012-06
Maturity Of Foreign Currency Derivatives Month And Year										2017-07
Amount of interest rate swap agreements change, of EURIBOR-based floating rate debt to fixed rate debt, for euro interest rate swaps designated as cash flow hedges					255	269
Amount of interest rate swap agreements change, of fixed rate debt to U.S. dollar LIBOR or GBP LIBOR-based floating rate debt, for both U.S. dollar and sterling interest rate swaps designated as fair value hedges							$ 500