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Financial risk management and derivative financial instruments - Summary of Undiscounted Contractual Cash Flows of Financial Liabilities (Detail) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Non-derivative financial liabilities: |  |
Lease liabilities | $ 3,403 | $ 3,430
Forward currency contract 2028 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (438) |
Forward currency contract 2028 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 425 |
Currency swaps hedging EUR500m 1.625% bonds 2024 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 594 | 575
Currency swaps hedging EUR500m 1.625% bonds 2024 Inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (563) | (552)
Currency swaps hedging EUR500m 2.125% bonds 2027 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 623 | 607
Currency swaps hedging EUR500m 2.125% bonds 2027 inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (601) | (590)
Currency swaps hedging €600m 4.375% bonds 2029 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 895 |
Currency swaps hedging €600m 4.375% bonds 2029 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (839) |
Deferred and contingent purchase consideration [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 94 | 94
Bank Overdrafts [member] |  |
Non-derivative financial liabilities: |  |
Borrowings | 44 | 55
GBP300m 3.75% bonds 2025 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 411 | 403
GBP350m 2.125% bonds 2026 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 474 | 457
EUR500m 2.125% bonds 2027 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 601 | 590
Trade Payables [Member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 657 | 664
Eur500m 1.625% bonds 2024 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 563 | 552
Financial Guarantee Contracts [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 50 | 50
GBP400m 3.375% bonds 2028 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 595 | 579
EUR600m 4.375% bonds 2029 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 839 |
Due within one year [member] |  |
Non-derivative financial liabilities: |  |
Lease liabilities | 57 | 53
Due within one year [member] | Currency swaps hedging EUR500m 1.625% bonds 2024 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 594 | 14
Due within one year [member] | Currency swaps hedging EUR500m 1.625% bonds 2024 Inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (563) | (9)
Due within one year [member] | Currency swaps hedging EUR500m 2.125% bonds 2027 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 19 | 18
Due within one year [member] | Currency swaps hedging EUR500m 2.125% bonds 2027 inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (12) | (11)
Due within one year [member] | Currency swaps hedging €600m 4.375% bonds 2029 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 40 |
Due within one year [member] | Currency swaps hedging €600m 4.375% bonds 2029 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (29) |
Due within one year [member] | Deferred and contingent purchase consideration [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 13 |
Due within one year [member] | Bank Overdrafts [member] |  |
Non-derivative financial liabilities: |  |
Borrowings | 44 | 55
Due within one year [member] | GBP300m 3.75% bonds 2025 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 14 | 14
Due within one year [member] | GBP350m 2.125% bonds 2026 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 9 | 9
Due within one year [member] | EUR500m 2.125% bonds 2027 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 12 | 11
Due within one year [member] | Trade Payables [Member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 651 | 660
Due within one year [member] | Eur500m 1.625% bonds 2024 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 563 | 9
Due within one year [member] | Financial Guarantee Contracts [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 50 | 50
Due within one year [member] | GBP400m 3.375% bonds 2028 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 17 | 16
Due within one year [member] | EUR600m 4.375% bonds 2029 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 29 |
Between 1 and 2 years [member] |  |
Non-derivative financial liabilities: |  |
Lease liabilities | 52 | 50
Between 1 and 2 years [member] | Currency swaps hedging EUR500m 1.625% bonds 2024 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging |  | 561
Between 1 and 2 years [member] | Currency swaps hedging EUR500m 1.625% bonds 2024 Inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging |  | (543)
Between 1 and 2 years [member] | Currency swaps hedging EUR500m 2.125% bonds 2027 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 19 | 18
Between 1 and 2 years [member] | Currency swaps hedging EUR500m 2.125% bonds 2027 inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (12) | (11)
Between 1 and 2 years [member] | Currency swaps hedging €600m 4.375% bonds 2029 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 40 |
Between 1 and 2 years [member] | Currency swaps hedging €600m 4.375% bonds 2029 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (29) |
Between 1 and 2 years [member] | Deferred and contingent purchase consideration [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities |  | 13
Between 1 and 2 years [member] | GBP300m 3.75% bonds 2025 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 397 | 14
Between 1 and 2 years [member] | GBP350m 2.125% bonds 2026 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 9 | 9
Between 1 and 2 years [member] | EUR500m 2.125% bonds 2027 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 12 | 11
Between 1 and 2 years [member] | Trade Payables [Member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 1 | 1
Between 1 and 2 years [member] | Eur500m 1.625% bonds 2024 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities |  | 543
Between 1 and 2 years [member] | GBP400m 3.375% bonds 2028 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 17 | 16
Between 1 and 2 years [member] | EUR600m 4.375% bonds 2029 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 29 |
After two but before five years [member] |  |
Non-derivative financial liabilities: |  |
Lease liabilities | 130 | 126
After two but before five years [member] | Forward currency contract 2028 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (438) |
After two but before five years [member] | Forward currency contract 2028 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 425 |
After two but before five years [member] | Currency swaps hedging EUR500m 2.125% bonds 2027 outflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 585 | 571
After two but before five years [member] | Currency swaps hedging EUR500m 2.125% bonds 2027 inflows [member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (577) | (568)
After two but before five years [member] | Currency swaps hedging €600m 4.375% bonds 2029 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 119 |
After two but before five years [member] | Currency swaps hedging €600m 4.375% bonds 2029 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (87) |
After two but before five years [member] | Deferred and contingent purchase consideration [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 81 | 39
After two but before five years [member] | GBP300m 3.75% bonds 2025 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities |  | 375
After two but before five years [member] | GBP350m 2.125% bonds 2026 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 456 | 439
After two but before five years [member] | EUR500m 2.125% bonds 2027 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 577 | 568
After two but before five years [member] | Trade Payables [Member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 3 | 1
After two but before five years [member] | GBP400m 3.375% bonds 2028 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 561 | 49
After two but before five years [member] | EUR600m 4.375% bonds 2029 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 87 |
More than 5 years [member] |  |
Non-derivative financial liabilities: |  |
Lease liabilities | 3,164 | 3,201
More than 5 years [member] | Currency swaps hedging €600m 4.375% bonds 2029 outflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | 696 |
More than 5 years [member] | Currency swaps hedging €600m 4.375% bonds 2029 inflows [Member] |  |
Derivative financial liabilities: |  |
Currency swaps hedging | (694) |
More than 5 years [member] | Deferred and contingent purchase consideration [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities |  | 42
More than 5 years [member] | Trade Payables [Member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | 2 | 2
More than 5 years [member] | GBP400m 3.375% bonds 2028 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities |  | $ 498
More than 5 years [member] | EUR600m 4.375% bonds 2029 [member] |  |
Non-derivative financial liabilities: |  |
Non-derivative financial liabilities | $ 694 |

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