Note 21: Other Postretirement Benefits (Detail) - Changes in the Company’s Benefit Obligation and Funded Status (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
Actuarial loss (gain)	510
Settlements		(3)
Other Postretirement Benefit Plans [Member] | Beginning of Period [Member]
Net benefit obligation	1,294	1,294	1,348
Other Postretirement Benefit Plans [Member] | End of Period [Member]
Net benefit obligation	137	137	1,294
Other Postretirement Benefit Plans [Member]
Underfunded status at end of year	(137)	(137)	(1,294)
Service cost		1	1
Interest cost		44	65
Plan participants’ contributions		17	20
Plan amendments		(460)
Actuarial loss (gain)		117	(4)
Settlements		(738)
Benefit payments		(134)	(134)
Other		(6)
Currency adjustments		$ 2	$ (2)