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Deferred taxation
12 Months Ended
Dec. 31, 2021
Deferred tax assets and liabilities [abstract]  
Deferred taxation 17 Deferred taxation
2021
US$m
2020
US$m
At 1 January – deferred tax asset/(liability)146 (118)
Adjustment on currency translation61 (43)
(Charged)/credited to the income statement(114)178 
(Charged)/credited to statement of comprehensive income(a)
(243)115 
Other movements(b)
22 14 
At 31 December – deferred tax (liability)/asset(128)146 

Comprising:
– deferred tax assets(c)(d)
3,375 3,385 
– deferred tax liabilities(e)
(3,503)(3,239)
17 Deferred taxation continued
Deferred tax balances for which there is a right of offset within the same tax jurisdiction are presented net on the face of the balance sheet as permitted by IAS 12. The closing deferred tax assets and liabilities, prior to this offsetting of balances, are shown below.
Analysis of deferred tax

Total
2021
US$m
Total
2020
US$m
Deferred tax assets arising from:
Tax losses(c)
1,492 1,867 
Provisions
2,165 2,121 
Capital allowances
784 529 
Post-retirement benefits
521 698 
Unrealised exchange losses
188 204 
Other temporary differences
1,356 1,046 
Total
6,506 6,465 
Deferred tax liabilities arising from:
Capital allowances
(5,019)(4,966)
Unremitted earnings(e)
(366)(402)
Capitalised interest
(342)(351)
Post-retirement benefits
(327)(224)
Unrealised exchange gains
(3)(7)
Other temporary differences
(577)(369)
Total(6,634)(6,319)

(Charged)/credited to the income statement
Unrealised exchange losses
 25 
Tax losses
(375)12 
Provisions
216 188 
Capital allowances
(42)(82)
Tax on unremitted earnings
(1)
Post-retirement benefits
21 
Other temporary differences
67 25 
Total(114)178 
(a)The amounts (charged)/credited directly to the statement of comprehensive income include provisions for tax on cash flow hedges and on re-measurement gains/(losses) on pension schemes and on post-retirement healthcare plans.
(b)“Other movements” include deferred tax relating to tax payable recognised by subsidiary holding companies on the profits of the equity accounted units to which it relates.
(c)US$1,152 million (2020: US$1,617 million) of recognised deferred tax assets are subject to expiry if not recovered within certain time limits as specified in local tax legislation and investment agreements. None (2020: US$65 million) of those recognised assets would expire within one year if not used, US$71 million (2020: US$85 million) would expire within one to five years, and US$1,081 million (2020: US$1,467 million) would expire in more than five years.
(d)Recognised and unrecognised deferred tax assets are shown in the table below and totalled US$7,024 million at 31 December 2021 (2020: US$7,226 million). Of this total, US$3,375 million has been recognised as deferred tax assets (2020: US$3,385 million), leaving US$3,649 million (2020: US$3,841 million) unrecognised, as recovery is not considered probable.
(e)Deferred tax liabilities are not recognised on the unremitted earnings of subsidiaries and joint ventures totalling US$2,081 million (2020: US$2,895 million) where the Group is able to control the timing of the remittance and it is probable that there will be no remittance in the foreseeable future. If these earnings were remitted, tax of US$103 million (2020: US$112 million) would be payable.

The recognised amounts in the table below do not include deferred tax assets that have been netted off against deferred tax liabilities.
Analysis of deferred tax assets

RecognisedUnrecognised

At 31 December
2021
US$m
2020
US$m
2021
US$m
2020
US$m
France
 — 1,222 1,284 
Canada
545 617 538 574 
US
851 938 67 84 
Australia
787 649 506 528 
Mongolia(a)
954 974 406 540 
Other238 207 910 831 
Total(b)
3,375 3,385 3,649 3,841 
(a)Deferred tax assets in Mongolia include US$108 million (2020: US$292 million) from tax losses that expire if not recovered against taxable profits within eight years. Tax losses have been calculated in accordance with the tax stability provisions of the Oyu Tolgoi Investment Agreement and Mongolian laws. The interpretation of the stabilised tax laws by the Mongolian Tax Authority has been, and is expected to continue to be, subject to dispute. Changes to agreements or their interpretation could have a material impact on the amount and period of recovery of deferred tax assets.
(b)US$705 million (2020: US$720 million) of the unrecognised assets relate to realised or unrealised capital losses, the recovery of which depends on the existence of capital gains in future years. There are time limits, the shortest of which is one year, for the recovery of US$356 million of the unrecognised assets (2020: US$551 million).