XML 187 R150.htm IDEA: XBRL DOCUMENT v3.19.1
Provision for post-employment benefits - Pension Expense Charged to Operating Profit, Amounts Charged to Finance Costs and Amounts Recognised in Consolidated Statement of Comprehensive Income (OCI) (Detail) - GBP (£)
£ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of net defined benefit (liability) asset      
Charge to operating profit £ 18.9 £ 16.1 £ 24.6
Net interest expense on pension plans 4.4 6.3 6.7
Actuarial gain/(loss) recognised in OCI 8.9 17.0 (15.9)
Post employment pension expense [member]      
Disclosure of net defined benefit (liability) asset      
Service cost 15.5 13.0 22.4
Administrative expenses 3.4 3.1 2.2
Charge to operating profit 18.9 16.1 24.6
Net interest expense on pension plans 4.4 6.3 6.7
Charge to profit before taxation for defined benefit plans 23.3 22.4 31.3
Return on plan assets (excluding interest income) (43.9) 13.4 66.3
Changes in demographic assumptions underlying the present value of the plan liabilities 3.8 12.7 6.7
Changes in financial assumptions underlying the present value of the plan liabilities 45.2 (17.0) (92.6)
Experience gain arising on the plan liabilities 3.8 7.9 1.0
Change in irrecoverable surplus     2.7
Actuarial gain/(loss) recognised in OCI £ 8.9 £ 17.0 £ (15.9)