Financial information by business unit

		Net earnings (a)		Gross sales revenue (b)		Operating assets (c)		Capital expenditure (d)
	Rio Tinto interest %	2006 US$m	2005 US$m	2006 US$m	2005 US$m	2006 US$m	2005 US$m	2006 US$m	2005 US$m
Iron Ore
Hamersley (inc. HIsmelt®)	100.0	1,660	1,219	4,416	3,387	4,321	2,555	1,696	935
Robe River	53.0	461	362	1,379	1,113	1,593	1,487	104	160
Iron Ore Company of Canada	58.7	145	148	1,051	954	651	451	151	98
Rio Tinto Brasil	100.0	13	(7)	92	43	97	81	18	36
		2,279	1,722	6,938	5,497	6,662	4,574	1,969	1,229
Energy
Rio Tinto Energy America	100.0	177	135	1,428	1,197	1,097	908	262	204
Rio Tinto Coal Australia	(e)	490	572	2,344	2,302	1,397	1,147	251	171
Rössing	68.6	27	2	229	163	68	66	38	3
Energy Resources of Australia	68.4	17	24	239	205	201	180	31	34
		711	733	4,240	3,867	2,763	2,301	582	412
Industrial Minerals		243	187	2,623	2,487	2,682	2,311	360	235
Aluminium	(f)	746	392	3,493	2,744	3,607	3,361	236	242
Copper
Kennecott Utah Copper	100.0	1,804	1,037	2,829	2,141	1,789	1,144	295	164
Escondida	30.0	1,250	602	2,575	1,239	792	812	155	229
Grasberg joint venture	(g)	122	232	373	657	412	321	45	45
Palabora	57.7	52	19	588	371	104	226	18	17
Kennecott Minerals	100.0	105	73	277	256	198	129	111	34
Northparkes	80.0	229	57	437	175	89	152	16	12
		3,562	2,020	7,079	4,839	3,384	2,784	640	501
Diamonds
Argyle	100.0	64	117	345	572	405	523	120	77
Diavik	60.0	131	143	460	460	639	548	105	121
Murowa	77.8	10	21	33	44	12	14	4	5
		205	281	838	1,076	1,056	1,085	229	203
Other operations		33	40	229	232	551	167	48	31
		7,779	5,375	25,440	20,742	20,705	16,583	4,064	2,853
Other items		(261)	(202)			(152)	(304)	169	41
Exploration and evaluation		(163)	(174)			116	(18)	5	4
Net interest		(17)	(44)
Less: equity accounted units								(322)	(382)
Underlying earnings		7,338	4,955
Items excluded from underlying earnings		100	260
		7,438	5,215	25,440	20,742	20,669	16,261	3,916	2,516
Less: net debt						(2,437)	(1,313)
Total Rio Tinto Shareholders' equity						18,232	14,948

Net earnings represent profit after tax for the year attributable to the Rio Tinto Group. Earnings of subsidiaries are stated before finance items but after the amortisation of the discount related to provisions. Earnings attributable to equity accounted units include interest charges and amortisation of discount. Earnings attributed to business units exclude amounts that are excluded in arriving at Underlying earnings.
Gross sales revenue includes 100 per cent of subsidiaries' sales revenue and the Group's share of the sales revenue of equity accounted units.
Operating assets of subsidiaries comprise net assets before deducting net debt, less outside shareholders' interests which are calculated by reference to the net assets of the relevant companies (ie net of such companies' debt). For equity accounted units, Rio Tinto's net investment is shown.
Capital expenditure comprises the net cash outflow on purchases less disposals of property, plant and equipment and intangible assets other than exploration. The details provided include 100 per cent of subsidiaries' capital expenditure and Rio Tinto's share of the capital expenditure of equity accounted units. Amounts relating to equity accounted units not specifically funded by Rio Tinto are deducted before arriving at total capital expenditure for the Group.
Includes Rio Tinto's 75.7 per cent interest in Coal & Allied, which is managed by Rio Tinto Coal Australia, a 100 per cent subsidiary of Rio Tinto.
Includes Rio Tinto's interests in Anglesey Aluminium (51 per cent) and Rio Tinto Aluminium (100 per cent).
Under the terms of a joint venture agreement, Rio Tinto is entitled to 40 per cent of additional material mined as a consequence of expansions and developments of the Grasberg facilities since 1998.
Business units have been classified according to the Group's management structure. Generally this structure has regard to the primary product of each business unit but there are exceptions. For example, the Copper group includes certain gold operations.