21. Other liabilities

	Note	2019 $m	Restated 2018 $m¹
Current
Deferred revenue		4	2
Total current other liabilities		4	2

Non-current
Deferred revenue		17	18
Defined benefit superannuation plan liability	32	152	76
Other		60	45
Total non-current other liabilities		229	139

¹ Comparatives have been restated for the adoption of AASB 16 Leases. Refer to Note 38(c).