XML 144 R132.htm IDEA: XBRL DOCUMENT v3.20.4
Deferred tax - Movements of Major Gross Deferred Tax Assets (Detail) - GBP (£)
£ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance [1] £ 153.0 £ 160.3
Ending balance [1] 187.9 153.0
Gross deferred tax assets [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 412.0 411.8
Acquisition of subsidiaries   2.0
Credit/(charge) to income 57.6 (16.6)
Charge to other comprehensive income (3.2) (0.2)
Credit/(charge) to equity 30.9 (1.6)
Transfer to disposal group classified as held for sale (56.3)  
Exchange differences (10.1) 16.6
Ending balance 430.9 412.0
Gross deferred tax assets [member] | Deferred compensation [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 61.6 53.5
Credit/(charge) to income (1.7) 4.7
Transfer to disposal group classified as held for sale (4.2)  
Exchange differences (2.2) 3.4
Ending balance 53.5 61.6
Gross deferred tax assets [member] | Accounting provisions and accruals [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 101.4 84.9
Credit/(charge) to income 10.2 13.0
Transfer to disposal group classified as held for sale (19.2)  
Exchange differences (5.0) 3.5
Ending balance 87.4 101.4
Gross deferred tax assets [member] | Retirement benefit obligation [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 68.5 75.6
Credit/(charge) to income 6.7 (11.2)
Charge to other comprehensive income (3.2) (0.2)
Transfer to disposal group classified as held for sale (12.3)  
Exchange differences (2.2) 4.3
Ending balance 57.5 68.5
Gross deferred tax assets [member] | Property, plant and equipment [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 47.9 68.4
Credit/(charge) to income 19.4 (20.6)
Credit/(charge) to equity 27.8  
Transfer to disposal group classified as held for sale (13.6)  
Exchange differences 3.2 0.1
Ending balance 84.7 47.9
Gross deferred tax assets [member] | Tax losses and credits [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 67.1 72.7
Credit/(charge) to income 24.2 (8.9)
Transfer to disposal group classified as held for sale (3.0)  
Exchange differences (2.0) 3.3
Ending balance 86.3 67.1
Gross deferred tax assets [member] | Share-based payments [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 16.8 33.0
Credit/(charge) to income 2.9 (15.3)
Credit/(charge) to equity 3.1 (1.6)
Transfer to disposal group classified as held for sale (0.7)  
Exchange differences (0.6) 0.7
Ending balance 21.5 16.8
Gross deferred tax assets [member] | Restructuring provisions [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 17.3 5.8
Credit/(charge) to income 12.5 10.7
Transfer to disposal group classified as held for sale (3.4)  
Exchange differences (0.6) 0.8
Ending balance 25.8 17.3
Gross deferred tax assets [member] | Other temporary differences [member]    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Beginning balance 31.4 17.9
Acquisition of subsidiaries   2.0
Credit/(charge) to income (16.6) 11.0
Transfer to disposal group classified as held for sale 0.1  
Exchange differences (0.7) 0.5
Ending balance £ 14.2 £ 31.4
[1] Figures have been restated, as described in the accounting policies.