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Accounts Receivable (Activity in the Allowance for Doubtful Accounts) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Allowance for Doubtful Accounts Receivable [Roll Forward] | |||
| Balance beginning of year | $ 74 | $ 79 | $ 66 |
| Additions‑ charged to expense | 81 | 75 | 68 |
| Deductions‑ write-offs | (72) | (80) | (55) |
| Balance end of year | $ 83 | $ 74 | $ 79 |
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- Definition
For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of direct write-downs of receivables charged against the allowance for doubtful accounts. No definition available.
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- Details
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- Definition
Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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