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Related Party Transactions (Tables) | 12 Months Ended
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Dec. 31, 2017
Related Party Transactions [Abstract] |
Schedule of Related Party Transactions [Table Text Block] |
| December 31,
| 2017 |  | 2016
Balance sheet location |  |  |
Accounts receivable, net | $ | 34 |  |  | $ | 37 |
Other current assets | 8 |  |  | — |
Deferred charges and other assets | 23 |  |  | 10 |
| $ | 65 |  |  | $ | 47 |
Current portion of debt | $ | 6 |  |  | $ | 6 |
Accounts payable | 18 |  |  | 28 |
Other current liabilities | 4 |  |  | 9 |
Long-term debt | 155 |  |  | 161 |
Other long-term liabilities and deferred credits | 35 |  |  | 29 |
| $ | 218 |  |  | $ | 233 |
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Income statement location |  |  |  |  |
Revenues |  |  |  |  |
Services | $ | 73 |  |  | $ | 71 |  |  | $ | 72 |
Product sales and other | 89 |  |  | 71 |  |  | 71 |
| $ | 162 |  |  | $ | 142 |  |  | $ | 143 |
Operating Costs, Expenses and Other |  |  |  |  |
Costs of sales | $ | 20 |  |  | $ | 38 |  |  | $ | 60 |
Other operating expenses | 100 |  |  | 75 |  |  | 55 |

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- References No definition available. + Details
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Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration