Ensco plc | 2013 | FY | 3


Other liabilities as of December 31, 2013 and 2012 consisted of the following (in millions):
 
 
2013
 
2012
Deferred revenue
 
$
217.6

 
$
224.5

Unrecognized tax benefits (inclusive of interest and penalties)

 
148.0

 
129.6

Intangible liabilities
 
69.1

 
118.0

Supplemental executive retirement plan liabilities
 
40.5

 
33.3

Personnel costs
 
37.2

 
31.6

Other
 
33.3

 
36.4

 
 
$
545.7

 
$
573.4


us-gaap:AccountsPayableAccruedLiabilitiesAndOtherLiabilitiesDisclosureNoncurrentTextBlock