| Group [member] | Company [member] | ||
| Investment properties [abstract] | |||
| Investment properties completed, at fair value [abstract] | |||
| Freehold land and building | |||
| Leasehold land and building | |||
| Total investment properties completed, at fair value | |||
| Investment properties under construction or development, at cost [abstract] | |||
| Building under construction | |||
| Total investment properties under construction or development, at cost | |||
| Other investment property | |||
| Total investment properties | |||