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Net Debt - Summary of Loans and Other Borrowings and Currency Swaps, Excluding Bank Overdrafts (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | $ 2,772 | $ 3,267
Cash flows | 629 | (245)
Exchange adjustment | 125 | (244)
Other | 27 | (6)
Ending balance | 3,553 | 2,772
Lease liabilities [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 427 | 419
Cash flows | (28) | (36)
Exchange adjustment | 2 | (4)
Other | 25 | 48
Ending balance | 426 | 427
Currency swaps [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 4 | 62
Other | 16 | (58)
Ending balance | 20 | 4
Currency forwards [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Other | (15) |
Ending balance | (15) |
GBP173m 3.875% bonds 2022 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance |  | 233
Cash flows |  | (209)
Exchange adjustment |  | (24)
EUR500m 1.625% bonds 2024 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 534 | 565
Exchange adjustment | 20 | (32)
Other | 1 | 1
Ending balance | 555 | 534
GBP300m 3.75% bonds 2025 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 365 | 408
Exchange adjustment | 22 | (45)
Other |  | 2
Ending balance | 387 | 365
GBP350m 2.125% bonds 2026 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 423 | 473
Exchange adjustment | 25 | (50)
Other | 1 |
Ending balance | 449 | 423
EUR500m 2.125% bonds 2027 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 539 | 570
Exchange adjustment | 20 | (32)
Other |  | 1
Ending balance | 559 | 539
GBP400m 3.375% bonds 2028 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 480 | 537
Exchange adjustment | 28 | (57)
Other | 1 |
Ending balance | 509 | 480
EUR600m 4.375% bonds 2029 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 0 |
Cash flows | 657 |
Exchange adjustment | 8 |
Other | (2) |
Ending balance | 663 | 0
Loans and other borrowings before currency swaps (excluding bank overdrafts) [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Beginning balance | 2,768 | 3,205
Cash flows | 629 | (245)
Exchange adjustment | 125 | (244)
Other | 26 | 52
Ending balance | $ 3,548 | $ 2,768

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