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Summary of Significant Accounting Policies ( stock-based compensation) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Revenue recognition | ||||||
| Maximum period to allow customers to return merchandise after the date of shipment | 30 days | |||||
| Aggregate reduction in net revenue due to returns | $ 1,965 | $ 1,900 | $ 1,739 | |||
| Advertising costs | ||||||
| Advertising costs | 91 | 81 | 56 | |||
| Stock-based compensation | ||||||
| Stock based compensation expense | 10 | 5 | 34 | 22 | 18 | |
| Impairment of long-lived assets | ||||||
| Impairment of CRM assets | 47 | |||||
| Derivatives | ||||||
| Changes in fair value of these interest rate swaps | $ 48 | $ 50 | $ 37 | |||
| Business acquisitions | ||||||
| Maximum period from the acquisition date for finalization of provisional estimate | 1 year | |||||
| X | ||||||||||
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- Definition
Represents the maximum period allowable to customers to return merchandise after the date of shipment. No definition available.
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- Definition
Represents the maximum period from the acquisition date for finalization of provisional estimate of the acquisition valuation. No definition available.
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- Definition
Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Net Increase or Decrease in the fair value of the derivative or group of derivatives included in earnings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- 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
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- Definition
Total deduction from sales during the period arising from goods returned by customers (other than under warranty provisions) and price reductions (allowance, price protection agreements) given by the entity. Returns and allowances are a deduction from gross revenue in arriving at net revenue. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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