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v3.19.3.a.u2

Revenues (Contract liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Contract balances |  |  |
Deferred contract revenues, recorded in other current liabilities | $ 100 | $ 87 |
Deferred contract revenues, recorded in other long-term liabilities | 429 | 399 |
Total contract liabilities | $ 529 | $ 486 | $ 625

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