|
Goodwill and Purchased Intangible Assets (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended |
|---|---|---|
|
Mar. 31, 2013
|
Dec. 31, 2012
|
|
| Goodwill [Line Items] | ||
| Goodwill expected to be deductible in future periods | $ 86 | |
| Amortization expense for purchased finite-lived intangible assets | 13 | 13 |
| Non-cash intangible asset impairment charges | 10 | |
|
Customer relationships [Member]
|
||
| Goodwill [Line Items] | ||
| Non-cash intangible asset impairment charges | 7 | |
|
Trade Names [Member]
|
||
| Goodwill [Line Items] | ||
| Non-cash intangible asset impairment charges | $ 3 |
| X | ||||||||||
|
- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Definition
Amount of deferred tax liability attributable to taxable temporary differences from goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|