Subsequen t c os ts T he Gr oup r ec ognises in the carrying amoun t o f an it em o f pr oper t y plan t and equipmen t the c os t o f r eplacing par t o f such an it em when tha t c os t is incurr ed if it is pr obable tha t the futur e ec onomic bene fts embodied within the it em wil l fo w t o the Gr oup and the c os t o f the it em can be me asur ed r eliably Al l o ther c os ts ar e r ec ognised in the pr o ft and los s s t a t emen t as an e xpense as incurr ed Depr ecia tion Depr ecia tion is calcula t ed on the depr eciable amoun t which is the c os t o f an as se t or o ther amoun t subs titut ed f or c os t les s its r esidual v alue Depr ecia tion is char ged t o the pr o ft and los s s t a t emen t on a s tr aigh t line or diminishing v alue basis o v er the es tima t ed use ful liv es o f e ach par t o f an it em o f pr oper t y plan t and equipmen t L and is no t depr ecia t ed T he es tima t ed use ful liv es in the curr en t and c ompar a tiv e periods ar e as f ol lo ws Buildings 2040 Y e ar s P lan t and equipmen t 310 Y e ar s L e asehold impr o v emen ts 320 Y e ar s L e ased plan t and equipmen t 45 Y e ar s T he r esidual v alue the use ful lif e and the depr ecia tion me thod applied t o an as se t ar e r e as ses sed a t le as t annual ly and ad jus t ed if appr opria t e 2F INVES T MENT PR OPER T Y In mil lions o f A UD C onsolida t ed 2019 2018 C arrying amoun t a t the beginning o f the ye a r 102 104 Depr ecia tion 01 02 C arrying amoun t a t end o f y e ar 101 102 In v es tmen t pr oper t y c omprises a c ommer cial pr oper t y le ased t o a thir d par t y T he curr en t le ase e xpir es in Sep t ember 2022 See no t e 4f Oper a ting le ases f or fur ther in f orma tion F air v alue o f the pr oper t y is es tima t ed t o be 190 mil lion 2018 190 mil lion based on a capit alis a tion r a t e o f 875 per c en t Ac c oun ting polic y In v es tmen t pr oper t y In v es tmen t pr oper t y is pr oper t y held either t o e arn r en t al inc ome or f or capit al appr ecia tion or f or bo th In v es tmen t pr oper t y is me asur ed a t c os t and is depr ecia t ed on a s tr aigh t line basis o v er the es tima t ed use ful lif e 2G INT ANGIBLE A S SET S C onsolida t ed In mil lions o f A UD Goodwil l Pur chased tr ademarks and br and names C us t omer R ela tionships T echnology So f tw ar e To t a l B alanc e a t 1 April 2017 9690 51 77 9818 Additions thr ough busines s c ombina tions 272 272 Impairmen t 1 630 630 Additions 05 54 01 50 110 T r ans f er 04 04 Dispos al 01 01 Held f or s ale 20 20 Amor tis a tion 26 23 49 Ef f ec t o f mo v emen ts in f or eign e x change 307 02 01 310 B alanc e a t 31 M ar ch 2018 9639 05 81 01 80 9806 Additions thr ough busines s c ombina tions 528 528 Additions 33 39 72 Held f or s ale 03 03 T r ans f er 15 15 Dispos al 03 03 Amor tis a tion 24 26 50 Ef f ec t o f mo v emen ts in f or eign e x change 98 03 95 B alanc e a t 31 M ar ch 2019 10265 05 87 01 102 10460 1 D u r i n g t h e y e a r e n d e d 3 1 M a r c h 2 0 1 8 I n r e c o g n i t i o n o f u n c e r t a i n m a r k e t c o n d i t i o n s b e i n g e x p e r i e n c e d i n t h e s e c t o r s s e r v i c e d b y t h e C o a l a n d I n d u s t r i a l b u s i n e s s e s g o o d w i l l i m p a i r m e n t c h a r g e s a m o u n t i n g t o 6 3 m i l l i o n w e r e r e c o g n i s e d i n r e s p e c t o f t h e s e c a s h g e n e r a t i n g u n i t s C o a l 4 0 m i l l i o n a n d I n d u s t r i a l 2 3 m i l l i o n 58 ALS LIMITED AND IT S SUBSIDIARIES A NNU AL F INANCIAL R EPOR T F OR THE Y EAR E NDED 31 M AR CH 2019 F INANCIAL REPOR T F INANCIAL S T A TEMENT S N O TES T O THE FINANCIAL S T A TEMENT S C apit al emplo y ed w orking capit al and o ther ins trumen ts