Table:
|  | 2019 | 2018 |
| --- | --- | --- |
|  | $ million | $ million |
| Within one year | 18.3 | 15.5 |
| Greater than one year | 10.3 | 12.7 |
|  | 28.6 | 28.2 |
Paragraphs:
Expected realisation of remaining performance obligations at year end
The Group applies the practical expedient in paragraph 121 of IFRS 15 and does not disclose information about remaining performance obligations that have original expected durations of one year or less.
For contracts that exceed one year, deferred income that relates to unsatisfied or partially satisfied performance obligations at year end is expected to be recognised as revenue in the future as follows:
The above information represents the revenue the Group will recognise when it satisfies the remaining performance obligations in the contracts. The amounts presented do not include orders for which the Group has not performed.
Question:
How is deferred income recognised for contracts that exceed one year?