Supplemental Financial Information (Details 8) (USD $) In Millions	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Accrued Rebate Activity
Beginning balance			$ 270	$ 162
Charged as a reduction of revenue			314	236
Reversal of unclaimed rebates			(7)	(3)
Payments	(163)	(132)	(282)	(164)
Ending balance	295	231	295	231
Warranty Reserve Activity
Beginning balance			13	10
Charged to costs and expenses	4	1	6	5
Payments			(5)	(2)
Ending balance	$ 14	$ 13	$ 14	$ 13

Accrued Rebate.

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- Definition

Accrued Rebate Activity Abstract.

+ Details

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- Definition

Accrued Rebate payments.

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- Definition

Rebates Charged as reduction of revenue.

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- Definition

Reversal of unclaimed rebates.

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ Details

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20
-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10

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- Definition

Represents the aggregate decrease in the liability related to payments to satisfy claims for standard and extended product warranties.

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- Definition

The expense charged against earnings for the period pertaining to standard and extended warranties on the entity's goods and services granted to customers.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

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