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Revenue Contract Balances (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($)
Deferred revenue - related parties, beginning balance | $ 43 |
Deferred revenue - related parties, ending balance | 43 |
Long-term deferred revenue, beginning balance | 42 |
Long-term deferred revenue, ending balance | 49 |
Long-term deferred revenue - related parties, beginning balance | 43 |
Long-term deferred revenue - related parties, ending balance | 49 |
Liability, change in timeframe, performance obligation satisfied, revenue recognized | 0 |
ASC 606 |  |
Contract assets, beginning balance | 4 | [1]
Contract assets, additions/(deletions) | 0 |
Contract assets, revenue recognized | 0 | [2]
Contract assets, ending balance | 4 |
Deferred revenue, beginning balance | 5 | [1]
Deferred revenue, additions/(deletions) | 2 |
Deferred revenue, revenue recognized | (2) | [2]
Deferred revenue, ending balance | 5 |
Deferred revenue - related parties, beginning balance | 42 | [1]
Deferred revenue - related party, additions/(deletions) | 9 |
Deferred revenue - related parties, revenue recognized | (9) | [2]
Deferred revenue - related parties, ending balance | 42 |
Long-term deferred revenue, beginning balance | 7 | [1]
Long-term deferred revenue, additions/(deletions) | 1 |
Long-term deferred revenue, revenue recognized | 0 | [2]
Long-term deferred revenue, ending balance | 8 |
Long-term deferred revenue - related parties, beginning balance | 39 | [1]
Long-term deferred revenue - related party, additions/(deletions) | 6 |
Long-term deferred revenue - related parties, revenue recognized | 0 | [2]
Long-term deferred revenue - related parties, ending balance | $ 45 |
[1] | Balance represents ASC 606 portion of each respective line items.
[2] | No revenue was recognized related to past performance obligations, in the current period. Changes in long-term amounts represent reclassifications to current balances.

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- Definition The carrying amount of consideration received or receivable from related parties as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. + References No definition available. + Details
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