Note 21: Other Postretirement Benefits (Detail) - Other Post Retirement Benefit Cost From Continuing Operations (USD $) In Millions, unless otherwise specified	2 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Service cost		$ 1	$ 1	$ 1
Interest cost		44	64	70
Amortization of:
Prior service credit		(83)	(77)	(76)
Actuarial loss		26	32	28
Other postretirment benefit cost (income) before curtailments and settlements		(12)	20	23
Curtailment gains	(9)	(9)	(3)
Settlement gains		(228)	(1)
Net other postretirement benefit cost (income) from continuing operations		$ (249)	$ 20	$ 23