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Business Combinations, Discontinued Operations, Sale of Other Disposal Groups and Selected Financial Information by Reportable Segment and Line of Business - Summary of Balance sheet Information by Geographic Segment (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of operating segments [line items] |  |
Total assets | $ 27,425 | $ 29,363
Total liabilities | 18,473 | 18,539
Net assets by segment | 8,952 | 10,824
Additions to fixed assets | 795 | 1,033
Mexico [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 3,837 | 3,910
Total liabilities | 1,523 | 1,443
Net assets by segment | 2,314 | 2,467
Additions to fixed assets | 144 | 199
United States [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 12,442 | 13,898
Total liabilities | 2,490 | 2,440
Net assets by segment | 9,952 | 11,458
Additions to fixed assets | 284 | 398
United Kingdom [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,513 | 1,562
Total liabilities | 1,368 | 1,225
Net assets by segment | 145 | 337
Additions to fixed assets | 55 | 67
France [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,052 | 978
Total liabilities | 585 | 460
Net assets by segment | 467 | 518
Additions to fixed assets | 62 | 38
Germany [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 416 | 401
Total liabilities | 357 | 353
Net assets by segment | 59 | 48
Additions to fixed assets | 24 | 25
Spain [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,023 | 1,190
Total liabilities | 230 | 185
Net assets by segment | 793 | 1,005
Additions to fixed assets | 22 | 34
Rest of EMEAA [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,181 | 1,179
Total liabilities | 417 | 435
Net assets by segment | 764 | 744
Additions to fixed assets | 51 | 65
Colombia [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,105 | 1,187
Total liabilities | 514 | 428
Net assets by segment | 591 | 759
Additions to fixed assets | 14 | 25
Panama [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 295 | 337
Total liabilities | 78 | 105
Net assets by segment | 217 | 232
Additions to fixed assets | 3 | 10
Caribbean TCL [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 493 | 542
Total liabilities | 258 | 236
Net assets by segment | 235 | 306
Additions to fixed assets | 16 | 21
Dominican Republic [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 158 | 193
Total liabilities | 66 | 66
Net assets by segment | 92 | 127
Additions to fixed assets | 2 | 8
Rest of South, Central America and the Caribbean [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 333 | 381
Total liabilities | 162 | 164
Net assets by segment | 171 | 217
Additions to fixed assets | 7 | 18
Philippines [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 761 | 689
Total liabilities | 158 | 141
Net assets by segment | 603 | 548
Additions to fixed assets | 82 | 84
Israel [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 769 | 611
Total liabilities | 507 | 429
Net assets by segment | 262 | 182
Additions to fixed assets | 28 | 33
Other Locations [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,860 | 1,466
Total liabilities | 9,754 | 10,392
Net assets by segment | (7,894) | (8,926)
Additions to fixed assets | 1 | 8
Continuing operation [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 27,238 | 28,524
Total liabilities | 18,467 | 18,502
Net assets by segment | 8,771 | 10,022
Additions to fixed assets | 795 | 1,033
Disposal groups classified as held for sale [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 187 | 839
Total liabilities | 6 | 37
Net assets by segment | 181 | 802
Equity accounted investment [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 510 | 481
Equity accounted investment [member] | United States [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 146 | 143
Equity accounted investment [member] | United Kingdom [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 6 | 6
Equity accounted investment [member] | France [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 53 | 50
Equity accounted investment [member] | Germany [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 4 | 4
Equity accounted investment [member] | Rest of EMEAA [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 9 | 11
Equity accounted investment [member] | Other Locations [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 292 | 267
Equity accounted investment [member] | Continuing operation [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 510 | 481
All other assets [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 26,915 | 28,882
All other assets [member] | Mexico [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 3,837 | 3,910
All other assets [member] | United States [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 12,296 | 13,755
All other assets [member] | United Kingdom [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,507 | 1,556
All other assets [member] | France [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 999 | 928
All other assets [member] | Germany [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 412 | 397
All other assets [member] | Spain [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,023 | 1,190
All other assets [member] | Rest of EMEAA [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,172 | 1,168
All other assets [member] | Colombia [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,105 | 1,187
All other assets [member] | Panama [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 295 | 337
All other assets [member] | Caribbean TCL [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 493 | 542
All other assets [member] | Dominican Republic [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 158 | 193
All other assets [member] | Rest of South, Central America and the Caribbean [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 333 | 381
All other assets [member] | Philippines [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 761 | 689
All other assets [member] | Israel [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 769 | 611
All other assets [member] | Other Locations [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 1,568 | 1,199
All other assets [member] | Continuing operation [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | 26,728 | 28,043
All other assets [member] | Disposal groups classified as held for sale [member] |  |
Disclosure of operating segments [line items] |  |
Total assets | $ 187 | $ 839

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