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Financial risk management and derivative financial instruments (Tables)
12 Months Ended
Dec. 31, 2023
Text Block [Abstract]  
Summary of Derivative Financial Instruments
Derivatives are recorded in the Group statement of financial position at fair value (see note 25) as follows:
 
Derivatives
         
  2023
$m
          
  2022
$m
 
Currency swaps
     
 
(20
    
 
(4
Currency forwards
     
 
15
 
    
 
 
Analysed as:
     
 
 
 
    
 
 
 
Non-current
assets
     
 
20
 
    
 
7
 
Current liabilities
     
 
(25
    
 
 
Non-current
liabilities
     
 
 
    
 
(11
 
     
 
(5
    
 
(4
Disclosure of Detailed Information About Hedging Instruments
Currency swaps and forwards have been transacted as follows:
 
Date of designation
      
Hedge type
  
Pay leg 
  
Interest rate 
 
Receive leg  
  
Interest rate  
 
Maturity
  
Risk
  
Hedged item
November 2018
    
Cash flow
  
£436m 
  
3.5%
 
500m
  
2.125%
 
May 2027
  
Foreign exchange 
  
500m 2.125% bonds 2027
October 2020
    
Cash flow
  
£454m
  
2.7%
 
500m
  
1.625%
 
October 2024
  
Foreign exchange
  
500m 1.625% bonds 2024
November 2023
    
Cash flow
  
$657m
  
6.0%
 
600m
  
4.375%
 
November 2029 
  
Foreign exchange
  
600m 4.375% bonds 2029
October 2023
    
Net investment 
  
$425m
  
n/a
 
£344m
  
n/a
 
October 2028
   Spot foreign  exchange   
Net assets of specified subsidiaries
with US dollar foreign currency
Summary of Interest and Foreign Exchange Risk Sensitivities
 
     
 
  2023
$m
 
 
    
 
  2022
$m
 
 
    
 
  2021
$m
 
 
(Decrease)/increase in profit before tax
 
 
  
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
Sterling: US dollar exchange rate
 
$0.05 fall
     
 
(14
    
 
(3
    
 
7
 
Euro: US dollar exchange rate
 
$0.05 fall
     
 
(3
    
 
 
    
 
 
US dollar interest rates
 
1% increase
     
 
2
 
    
 
4
 
    
 
7
 
Sterling interest rates
 
1% increase
     
 
9
 
    
 
4
 
    
 
5
 
(Increase)/decrease in net liabilities
 
 
     
 
 
 
    
 
 
 
    
 
 
 
Sterling: US dollar exchange rate
 
$0.05 fall
     
 
(12
    
 
27
 
    
 
29
 
Euro: US dollar exchange rate
 
$0.05 fall
     
 
49
 
    
 
50
 
    
 
50
 
Sterling: euro exchange rate
 
0.05 fall
     
 
64
 
    
 
60
 
    
 
67
 
Summary of amended covenant test levels for syndicated and bilateral facilities
 
     
 
31 December
    2023 and 2022
 
 
  
 
         
 
  
 
31 December
2021
 
 
Covenant test levels for RCF
  
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Leverage
     
 
<4.0x
 
  
 
 
 
  
 
waived
 
Interest cover
     
 
>3.5x
 
  
 
 
 
  
 
waived
 
Liquidity
     
 
n/a
 
  
 
 
 
  
 
$400m
a
 
 
a
 
Defined as unrestricted cash and cash equivalents (net of bank overdrafts) plus undrawn facilities with a remaining term of at least six months.
Summary of covenant tests
 
     
 
  2023
 
    
 
  2022
 
    
 
  2021
 
Covenant measures
  
 
 
  
 
 
 
 
 
 
  
 
 
 
 
 
 
  
 
 
 
Covenant EBITDA ($m)
     
 
1,086
  
    
 
896
  
    
 
601
 
Covenant net debt ($m)
     
 
2,328
 
    
 
1,898
 
    
 
1,801
 
Covenant interest payable ($m)
     
 
88
 
    
 
109
 
    
 
133
 
Leverage
     
 
2.14
 
    
 
2.12
 
    
 
3.00
 
Interest cover
     
 
12.34
 
    
 
8.22
 
    
 
4.52
 
Liquidity ($m)
     
 
n/a
 
    
 
n/a
 
    
 
2,655
 
 
a
At 31 December 2021, the leverage and interest covenants under the previous facilities were waived and replaced with a liquidity requirement of $400m.
Summary of Undiscounted Contractual Cash Flows of Non-Derivative Financial Liabilities
31 December 2023
         
 Less than
1 year
$m
   
  Between
1 and 2
years
$m
   
  Between
2 and 5
years
$m
   
 More than
5 years
$m
   
     Total
$m
 
Non-derivative
financial liabilities:
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Bank overdrafts
     
 
44
 
 
 
 
 
 
 
 
 
 
 
 
44
 
500m 1.625% bonds 2024
     
 
563
 
 
 
 
 
 
 
 
 
 
 
 
563
 
£300m 3.75% bonds 2025
     
 
14
 
 
 
397
 
 
 
 
 
 
 
 
 
411
 
£350m 2.125% bonds 2026
     
 
9
 
 
 
9
 
 
 
456
 
 
 
 
 
 
474
 
500m 2.125% bonds 2027
     
 
12
 
 
 
12
 
 
 
577
 
 
 
 
 
 
601
 
£400m 3.375% bonds 2028
     
 
17
 
 
 
17
 
 
 
561
 
 
 
 
 
 
595
 
600m 4.375% bonds 2029
     
 
29
 
 
 
29
 
 
 
87
 
 
 
694
 
 
 
839
 
Lease liabilities
     
 
57
 
 
 
52
 
 
 
130
 
 
 
3,164
 
 
 
3,403
 
Trade and other payables (excluding deferred and contingent purchase consideration)
     
 
651
 
 
 
1
 
 
 
3
 
 
 
2
 
 
 
657
 
Deferred and contingent purchase consideration
     
 
13
 
 
 
 
 
 
81
 
 
 
 
 
 
94
 
Financial guarantee contracts
     
 
50
 
 
 
 
 
 
 
 
 
 
 
 
50
 
Derivative financial liabilities:
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Currency swaps hedging
500m 1.625% bonds 2024 outflows
     
 
594
 
 
 
 
 
 
 
 
 
 
 
 
594
 
Currency swaps hedging
500m 1.625% bonds 2024 inflows
     
 
(563
 
 
 
 
 
 
 
 
 
 
 
(563
Currency swaps hedging
500m 2.125% bonds 2027 outflows
     
 
19
 
 
 
19
 
 
 
585
 
 
 
 
 
 
623
 
Currency swaps hedging
500m 2.125% bonds 2027 inflows
     
 
(12
 
 
(12
 
 
(577
 
 
 
 
 
(601
Currency swaps hedging
600m 4.375% bonds 2029 outflows
     
 
40
 
 
 
40
 
 
 
119
 
 
 
696
 
 
 
895
 
Currency swaps hedging
600m 4.375% bonds 2029 inflows
     
 
(29
 
 
(29
 
 
(87
 
 
(694
 
 
(839
Forward currency contract 2028 inflows
     
 
 
 
 
 
 
 
(438
 
 
 
 
 
(438
Forward currency contract 2028 outflows
     
 
 
 
 
 
 
 
425
 
 
 
 
 
 
425
 
 
31 December 2022
a
         
    Less than
1 year
$m
   
    Between
1 and 2
years
$m
   
   Between
2 and 5
years
$m
   
  More than
5 years
$m
    
        Total
$m
 
Non-derivative
financial liabilities:
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
Bank overdrafts
     
 
55
 
 
 
 
 
 
 
 
 
 
  
 
55
 
500m 1.625% bonds 2024
     
 
9
 
 
 
543
 
 
 
 
 
 
 
  
 
552
 
£300m 3.75% bonds 2025
     
 
14
 
 
 
14
 
 
 
375
 
 
 
 
  
 
403
 
£350m 2.125% bonds 2026
     
 
9
 
 
 
9
 
 
 
439
 
 
 
 
  
 
457
 
500m 2.125% bonds 2027
     
 
11
 
 
 
11
 
 
 
568
 
 
 
 
  
 
590
 
£400m 3.375% bonds 2028
     
 
16
 
 
 
16
 
 
 
49
 
 
 
498
 
  
 
579
 
Lease liabilities
     
 
53
 
 
 
50
 
 
 
126
 
 
 
3,201
 
  
 
3,430
 
Trade and other payables (excluding deferred and contingent purchase consideration)
     
 
660
 
 
 
1
 
 
 
1
 
 
 
2
 
  
 
664
 
Deferred and contingent purchase consideration
     
 
 
 
 
13
 
 
 
39
 
 
 
42
 
  
 
94
 
Financial guarantee contracts
     
 
50
 
 
 
 
 
 
 
 
 
 
  
 
50
 
Derivative financial liabilities:
     
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
Currency swaps hedging
500m 1.625% bonds 2024 outflows
     
 
14
 
 
 
561
 
 
 
 
 
 
 
  
 
575
 
Currency swaps hedging
500m 1.625% bonds 2024 inflows
     
 
(9
 
 
(543
 
 
 
 
 
 
  
 
(552
Currency swaps hedging
500m 2.125% bonds 2027 outflows
     
 
18
 
 
 
18
 
 
 
571
 
 
 
 
  
 
607
 
Currency swaps hedging
500m 2.125% bonds 2027 inflows
     
 
(11
 
 
(11
 
 
(568
 
 
 
  
 
(590
 
a
 
Re-presented
for the application of IFRS 9 ‘Financial Instruments’ to financial guarantee contracts.
Disclosure of Short-term Deposits by Counterparty Credit Rating
The table below analyses the Group’s short-term deposits, money market funds and repurchase agreement collateral classified as cash and cash equivalents by counterparty credit rating:
 
31 December 2023
         
  AAA 
$m 
    
     AA+
$m
    
    AA
$m
    
    AA-
$m
    
    A+
$m
    
    A
$m
    
    A-
$m
    
   BBB+ and
below
$m
    
    Total
$m
 
Short-term deposits
     
 
 
  
 
 
  
 
 
  
 
129
 
  
 
147
 
  
 
258
 
  
 
77
 
  
 
21
 
  
 
632
 
Money market funds
     
 
375
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
375
 
Repurchase agreement collateral
     
 
110
 
  
 
6
 
  
 
 
  
 
20
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
136
 
 
31 December 2022
         
   AAA
$m
    
      AA+ 
$m 
    
    AA
$m
    
    AA-
$m
    
    A+
$m
    
    A
$m
    
    A-
$m
    
    BBB+ and
below
$m
    
     Total
$m
 
Short-term deposits
     
 
 
  
 
 
  
 
 
  
 
66
 
  
 
127
 
  
 
141
 
  
 
50
 
  
 
37
 
  
 
421
 
Money market funds
     
 
360
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
360
 
Repurchase agreement collateral
     
 
22
 
  
 
2
 
  
 
6
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
30