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Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011


	As of December 31, 2011							As of December 31, 2010
(millions)	Gross Carrying Amount		Accumulated Amortization			Net		Gross Carrying Amount		Accumulated Amortization			Net
Intangible Assets with Definite Lives:
Customer relationships	$	70	$	(34	)	$	36	$	70	$	(26	)	$	44
Other		9		(5	)		4		9		(5	)		4

Total	$	79	$	(39	)	$	40	$	79	$	(31	)	$	48

Intangible Assets with Indefinite Lives


(millions)	2012		2013		2014		2015		2016
Estimated annual amortization expense	$	8	$	7	$	7	$	7	$	7

Estimated annual amortization expense intangible assets


	As of December 31, 2011						As of December 31, 2010
(millions)	Gross Carrying Amount		Impairment Charges		Net		Gross Carrying Amount		Impairment Charges			Net
Intangible Assets with Indefinite Lives:
Trade names	$	22	$	—	$	22	$	22	$	—		$	22
Other		8		—		8		9		(1	)		8

Total	$	30	$	—	$	30	$	31	$	(1	)	$	30

- Definition

Tabular disclosure of amortizable intangibles assets, in total and by major class, including the gross carrying amount and accumulated amortization. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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