Note 15: Financial Instruments (Detail) - Financial Instruments Not Recorded at Fair Value (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
	$ 699	$ 152	$ 50	$ 62	$ 51
	2,122	1,515
Debt subject to compromise	2,716
Other Long Term Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Long-term held-to-maturity	23
	23
Other Long Term Assets [Member]
Long-term held-to-maturity	23
	23
Short Tem Borrowings and Current Portion of Long Term Debt [Member] | Fair Value, Inputs, Level 2 [Member]
Short-term debt	699
	27
Short Tem Borrowings and Current Portion of Long Term Debt [Member]
Short-term debt	699
	27
Long Term Debt Net of Current Portion [Member] | Fair Value, Inputs, Level 2 [Member]
Long-term debt	740
	1,265
Long Term Debt Net of Current Portion [Member]
Long-term debt	740
	1,265
Liabilities Subject to Compromise [Member] | Fair Value, Inputs, Level 2 [Member] | Debt Subject to Compromise Carrying Value [Member]
Debt subject to compromise	683
Liabilities Subject to Compromise [Member] | Fair Value, Inputs, Level 2 [Member]
Debt subject to compromise	72
Liabilities Subject to Compromise [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]
Debt subject to compromise	72
Liabilities Subject to Compromise [Member] | Debt Subject to Compromise Carrying Value [Member]
Debt subject to compromise	$ 683