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Supplemental Financial Information | 9 Months Ended
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Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Supplemental Financial Information | Supplemental Financial Information
| As of
In millions | September 30, 2018 |  | December 31, 2017
Inventories |  |  |
Finished goods | $ | 33 |  |  | $ | 18 |
Service parts | 12 |  |  | 12 |
Total inventories | $ | 45 |  |  | $ | 30 |
Deferred revenue |  |  |
Deferred revenue, current | $ | 384 |  |  | $ | 414 |
Long-term deferred revenue | 102 |  |  | 85 |
Total deferred revenue | $ | 486 |  |  | $ | 499 |

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI http://asc.fasb.org/topic&trid=2122208 + Details
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