Schedule of Notional Amounts of Financial Instruments (Detail) In Millions, unless otherwise specified	Jun. 30, 2012 USD ($)	Jun. 30, 2012 Embedded Derivative Nondesignated USD ($)	Dec. 31, 2011 Embedded Derivative Nondesignated USD ($)	Jun. 30, 2012 Interest Rate Contract Nondesignated USD ($)		Dec. 31, 2011 Interest Rate Contract Nondesignated USD ($)		Jun. 30, 2012 Natural gas contracts Commodity Cash Flow Hedging	Dec. 31, 2011 Natural gas contracts Commodity Cash Flow Hedging	Jun. 30, 2012 Foreign Exchange Contracts To Sell British Pounds For Brazilian Real Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging GBP (£)		Dec. 31, 2011 Foreign Exchange Contracts To Sell British Pounds For Brazilian Real Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging GBP (£)		Jun. 30, 2012 Foreign Exchange Contracts To Sell European Euro For Brazilian Real Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging EUR (€)		Dec. 31, 2011 Foreign Exchange Contracts To Sell European Euro For Brazilian Real Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging EUR (€)		Jun. 30, 2012 Foreign Exchange Contracts To Sell European Euro For Polish Zloty Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging EUR (€)		Dec. 31, 2011 Foreign Exchange Contracts To Sell European Euro For Polish Zloty Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging EUR (€)		Jun. 30, 2012 Foreign Exchange Contracts To Sell U.S. Dollar For Brazilian Real Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging USD ($)		Dec. 31, 2011 Foreign Exchange Contracts To Sell U.S. Dollar For Brazilian Real Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging USD ($)		Jun. 30, 2012 Foreign Exchange Contracts To Sell U.S. Dollar For Brazilian Real Zero cost collar Foreign Exchange Contract Cash Flow Hedging USD ($)		Dec. 31, 2011 Foreign Exchange Contracts To Sell U.S. Dollar For Brazilian Real Zero cost collar Foreign Exchange Contract Cash Flow Hedging USD ($)		Jun. 30, 2012 Foreign Exchange Contracts To Sell U.S. Dollar For European Euro Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging USD ($)		Dec. 31, 2011 Foreign Exchange Contracts To Sell U.S. Dollar For European Euro Foreign Exchange Forward Foreign Exchange Contract Cash Flow Hedging USD ($)		Jun. 30, 2012 Foreign Exchange Contracts To Sell Indian Rupee For U.S. Dollar Foreign Exchange Contract Nondesignated INR		Dec. 31, 2011 Foreign Exchange Contracts To Sell Indian Rupee For U.S. Dollar Foreign Exchange Contract Nondesignated INR		Jun. 30, 2012 Foreign Exchange Contracts to Sell Thai Baht for US Dollar Foreign Exchange Contract Nondesignated THB		Dec. 31, 2011 Foreign Exchange Contracts to Sell Thai Baht for US Dollar Foreign Exchange Contract Nondesignated THB
Derivative [Line Items]
Sell Notional										£ 23	[1]	£ 26	[1]	€ 21	[1]	€ 16	[1]	€ 183	[1]	€ 233	[1]	$ 338	[1]	$ 344	[1]	$ 18	[1]	$ 0	[1]	$ 1	[1]	$ 13	[1]	276	[2]	904	[2]	225	[2]	0	[2]
Commodity contracts								0	3,000,000
Embedded derivative (in USD)		150	150
Interest rate contracts (in USD)	$ 150			$ 150	[3]	$ 150	[3]

[1] These contracts had maturities of three years or less as of June 30, 2012.

[2] These contracts had maturities of one year or less as of June 30, 2012.

[3] Includes $150 million floating-to-fixed interest rate swap notional to offset the embedded derivative.