Restructuring And Asset Impairment Charges (Schedule Of Restructuring Charges Table) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Restructuring Cost and Reserve [Line Items]
Beginning reserve balance	$ 28	[1]	$ 21		$ 13
Charged to costs and expenses	19	[2]	34	[2]	31	[2]
Payments and other	(19)		(27)		(23)
Ending reserve balance	28	[1]	28	[1]	21
Branch closure charges
Restructuring Cost and Reserve [Line Items]
Beginning reserve balance	26		20		11
Charged to costs and expenses	17	[2]	28	[2]	24	[2]
Payments and other	(16)		(22)		(15)
Ending reserve balance	27		26		20
Severance costs
Restructuring Cost and Reserve [Line Items]
Beginning reserve balance	2		1		2
Charged to costs and expenses	2	[2]	6	[2]	7	[2]
Payments and other	(3)		(5)		(8)
Ending reserve balance	$ 1		$ 2		$ 1

[1] Relates to branch closure charges and severance costs. See note 5 (“Restructuring and Asset Impairment Charges”) for additional detail.

[2] Reflected in our consolidated statements of income as “Restructuring charge.”