XML 349 R146.htm IDEA: XBRL DOCUMENT v3.10.0.1
Property, plant and equipment - Summary of property, plant and equipment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period $ 62,093 $ 58,855  
Adjustment on currency translation (c) (4,157) 3,381  
Adjustments to capitalised closure costs 486 710  
Amounts capitalised 296 224 $ 111
Additions 5,301 4,751  
Depreciation for the year (a) (e) (3,882) (4,198) (4,567)
Impairment charges (f) (130) (435)  
Disposals (130) (123)  
Subsidiaries no longer consolidated (g) (3,386) (749)  
Transfers and other movements (h) (130) (323)  
Property, plant and equipment at end of period 56,361 62,093 58,855
Non-current assets held under finance leases (i) 31 37  
Non-current assets pledged as security (j) 13,221 12,303  
Cost [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 115,889    
Property, plant and equipment at end of period 104,294 115,889  
Accumulated amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period (53,796)    
Property, plant and equipment at end of period (47,933) (53,796)  
Mining properties and leases [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 11,488 10,848  
Adjustment on currency translation (c) (689) 495  
Adjustments to capitalised closure costs 486 710  
Additions 403 230  
Depreciation for the year (a) (e) (664) (673)  
Impairment charges (f) (3) (304)  
Disposals (1)    
Subsidiaries no longer consolidated (g) (1,103) (211)  
Transfers and other movements (h) 1,146 393  
Property, plant and equipment at end of period 11,063 11,488 10,848
Non-current assets pledged as security (j) 3,054 3,307  
Mining properties and leases [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 24,691    
Property, plant and equipment at end of period 23,318 24,691  
Mining properties and leases [member] | Accumulated amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period (13,203)    
Property, plant and equipment at end of period (12,255) (13,203)  
Land and buildings [Member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 7,376 7,316  
Adjustment on currency translation (c) (548) 461  
Additions 80 41  
Depreciation for the year (a) (e) (382) (403)  
Impairment charges (f) (20) (2)  
Disposals (54) (57)  
Subsidiaries no longer consolidated (g) (377) (95)  
Transfers and other movements (h) 188 115  
Property, plant and equipment at end of period 6,263 7,376 7,316
Non-current assets pledged as security (j) 385 410  
Land and buildings [Member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 12,029    
Property, plant and equipment at end of period 10,601 12,029  
Land and buildings [Member] | Accumulated amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period (4,653)    
Property, plant and equipment at end of period (4,338) (4,653)  
Plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 36,285 35,706  
Adjustment on currency translation (c) (2,671) 2,242  
Additions 459 646  
Depreciation for the year (a) (e) (2,836) (3,122)  
Impairment charges (f) (101) (128)  
Disposals (71) (40)  
Subsidiaries no longer consolidated (g) (1,392) (417)  
Transfers and other movements (h) 2,346 1,398  
Property, plant and equipment at end of period 32,019 36,285 35,706
Non-current assets held under finance leases (i) 31 37  
Non-current assets pledged as security (j) 5,194 5,308  
Plant and equipment [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 71,903    
Property, plant and equipment at end of period 63,051 71,903  
Plant and equipment [member] | Accumulated amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period (35,618)    
Property, plant and equipment at end of period (31,032) (35,618)  
Capital works in progress [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 6,944 4,985  
Adjustment on currency translation (c) (249) 183  
Amounts capitalised 296 224  
Additions 4,359 3,834  
Impairment charges (f) (6) (1)  
Disposals (4) (26)  
Subsidiaries no longer consolidated (g) (514) (26)  
Transfers and other movements (h) (3,810) (2,229)  
Property, plant and equipment at end of period 7,016 6,944 $ 4,985
Non-current assets pledged as security (j) 4,588 3,278  
Capital works in progress [member] | Cost [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period 7,266    
Property, plant and equipment at end of period 7,324 7,266  
Capital works in progress [member] | Accumulated amortisation and impairment [member]      
Disclosure of detailed information about property, plant and equipment [Line Items]      
Property, plant and equipment at beginning of period (322)    
Property, plant and equipment at end of period $ (308) $ (322)