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Assets Held For Sale and Discontinued Operations - Summary of Discontinued Operations (Detail) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of discontinued operations [abstract]      
Revenue     $ 3,557
EBITDA (as defined)*     224
Depreciation     (108)
Amortisation     (2)
Impairment     (1)
Operating profit     113
(Loss)/profit on disposals     (2)
Profit before finance costs     111
Finance costs     (8)
Share of equity accounted investments' profit     14
Profit before tax $ 0 $ 0 117
Attributable income tax expense     (26)
Profit after tax for the financial year from discontinued operations 0 0 91
Profit attributable to:      
Equity holders of the Company 0 0 90
Non-controlling interests 0 0 1
Profit after tax for the financial year from discontinued operations $ 0 $ 0 $ 91
Basic earnings per Ordinary Share from discontinued operations     $ 0.113
Diluted earnings per Ordinary Share from discontinued operations     $ 0.112
Cash flows from discontinued operations      
Net cash inflow/(outflow) from operating activities     $ 36
Net cash inflow/(outflow) from investing activities     1,722
Net cash outflow from financing activities     (80)
Net cash inflow     $ 1,678