Contract liabilities represent an entity’s obligations to provide customers with goods or services for which it has already been paid, or for which payment is due. Changes in contract liabilities were as follows:
| (in millions of euros) | 31/12/2018 | Amounts recorded during the period | Amounts transferred to sales during the period | Amounts cancelled during the period with no impact on sales | Effect of unwinding the discount | Change in scope of consolidation | Foreign exchange effect | 31/12/2019 |
|---|---|---|---|---|---|---|---|---|
| Advance payments received | Advance payments received 31/12/2018 1,858 | Advance payments received Amounts recorded during the period 1,915 | Advance payments received Amounts transferred to sales during the period (1,992) | Advance payments received Amounts cancelled during the period with no impact on sales (37) | Advance payments received Effect of unwinding the discount (1) | Advance payments received Change in scope of consolidation - | Advance payments received Foreign exchange effect 18 | Advance payments received 31/12/2019 1,761 |
| Deferred income on long-term contracts | Deferred income on long-term contracts 31/12/2018 3,413 | Deferred income on long-term contracts Amounts recorded during the period 476 | Deferred income on long-term contracts Amounts transferred to sales during the period (545) | Deferred income on long-term contracts Amounts cancelled during the period with no impact on sales (2) | Deferred income on long-term contracts Effect of unwinding the discount 64 | Deferred income on long-term contracts Change in scope of consolidation 4 | Deferred income on long-term contracts Foreign exchange effect 2 | Deferred income on long-term contracts 31/12/2019 3,412 |
| Other deferred income | Other deferred income 31/12/2018 577 | Other deferred income Amounts recorded during the period 413 | Other deferred income Amounts transferred to sales during the period (481) | Other deferred income Amounts cancelled during the period with no impact on sales - | Other deferred income Effect of unwinding the discount - | Other deferred income Change in scope of consolidation - | Other deferred income Foreign exchange effect - | Other deferred income 31/12/2019 509 |
These liabilities comprise the majority of advances and progress payments received, amounting to €1,761 million (principally concerning the Framatome, United Kingdom and France – Regulated Activities segments), and the majority of deferred income (on long-term and other contracts), amounting to €3,921 million (principally concerning the France – Generation and Supply segment). They thus total €5,682 million at 31 December 2019 (€5,848 million at 31 December 2018).
Contracts expiring in more than one year on which obligations are unfulfilled or partially fulfilled at the reporting date should generate sales revenues of approximately €12,388 million which have not yet been recognised. €1,330 million of these sales revenues will be recognised progressively until 2034 on the Exeltium contract, and the balance will be recognised over the operating period for contracts relating to jointly-operated power plants, and over the term of the contract for other firm sale contracts (excluding energy sales).
