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Segmental information - Summary of Information by Reportable Segment - Segmental Result (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of reportable segments [line items] |  |  |
Revenue | $ 1,784 | $ 1,715 | $ 1,803
Operating profit | 763 | 678 | 1,499
Net finance costs | (85) | (87) | (87)
Profit before tax | 678 | 591 | 1,412
Tax | (85) | (174) | (188)
Profit for the year | 593 | 417 | 1,224
Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,784 | 1,715 | 1,803
Operating profit | 759 | 707 | 680
Profit before tax | 674 | 620 | 593
Tax | (201) | (186) | (180)
Profit for the year | 473 | 434 | 413
Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 4 | (29) | 819
Profit before tax | 4 | (29) | 819
Tax | 116 | 12 | (8)
Profit for the year | 120 | (17) | 811
Franchised [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 833 | 806 | 785
Franchised [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 707 | 693 | 669
Managed [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 619 | 595 | 591
Managed [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 255 | 239 | 241
Owned and leased [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 184 | 173 | 292
Owned and leased [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 31 | 26 | 57
Regional and central [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 148 | 141 | 135
Regional and central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (234) | (251) | (287)
Americas [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,025 | 993 | 955
Operating profit | 681 | 604 | 556
Americas [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 644 | 633 | 597
Americas [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 37 | (29) | (41)
Americas [member] | Franchised [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 703 | 685 | 661
Americas [member] | Franchised [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 606 | 600 | 575
Americas [member] | Managed [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 172 | 172 | 166
Americas [member] | Managed [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 65 | 64 | 64
Americas [member] | Owned and leased [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 150 | 136 | 128
Americas [member] | Owned and leased [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 29 | 24 | 24
Americas [member] | Regional and central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (56) | (55) | (66)
Europe [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 241 | 227 | 265
Operating profit | 84 | 75 | 253
Europe [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 86 | 75 | 78
Europe [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (2) |  | 175
Europe [member] | Franchised [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 109 | 102 | 104
Europe [member] | Franchised [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 85 | 78 | 77
Europe [member] | Managed [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 132 | 125 | 131
Europe [member] | Managed [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 26 | 22 | 28
Europe [member] | Owned and leased [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue |  |  | 30
Europe [member] | Owned and leased [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit |  |  | 1
Europe [member] | Regional and central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (25) | (25) | (28)
AMEA [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 244 | 237 | 241
Operating profit | 85 | 82 | 84
AMEA [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 87 | 82 | 86
AMEA [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (2) |  | (2)
AMEA [member] | Franchised [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 17 | 16 | 16
AMEA [member] | Franchised [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 14 | 12 | 12
AMEA [member] | Managed [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 193 | 184 | 189
AMEA [member] | Managed [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 91 | 89 | 90
AMEA [member] | Owned and leased [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 34 | 37 | 36
AMEA [member] | Owned and leased [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 2 | 2 | 3
AMEA [member] | Regional and central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (20) | (21) | (19)
Greater China [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 126 | 117 | 207
Operating profit | 52 | 45 | 768
Greater China [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 52 | 45 | 70
Greater China [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit |  |  | 698
Greater China [member] | Franchised [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 4 | 3 | 4
Greater China [member] | Franchised [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 2 | 3 | 5
Greater China [member] | Managed [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 122 | 114 | 105
Greater China [member] | Managed [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 73 | 64 | 59
Greater China [member] | Owned and leased [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue |  |  | 98
Greater China [member] | Owned and leased [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit |  |  | 29
Greater China [member] | Regional and central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (23) | (22) | (23)
Central [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 148 | 141 | 135
Operating profit | (139) | (128) | (162)
Central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (110) | (128) | (151)
Central [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (29) |  | (11)
Central [member] | Regional and central [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 148 | 141 | 135
Central [member] | Regional and central [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | $ (110) | $ (128) | $ (151)

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