|
Accounts Receivable (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Dec. 31, 2013
|
|
| Accounts Receivable Details [Abstract] | |||||
| Allowance for doubtful accounts | $ 4 | $ 4 | $ 1 | ||
| Allowance for doubtful accounts - receivables not expected to be collected in one year | 18 | 18 | 22 | ||
| Receivables Securitization Facility [Abstract] | |||||
| Total capacity to transfer undivided interests to investors under the receivables securitization facility | 600 | 600 | 600 | 600 | 600 |
| Value of the outstanding undivided interest held by investors under the receivables securitization facility | 400 | 400 | 0 | ||
| Accounts receivable supporting the undivided interest held by investors | 1,300 | 1,300 | 1,100 | ||
| Cost of the receivables securitization facility - interest expense | $ 1 | $ 1 | $ 1 | $ 2 | |