XML 388 R115.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Tax - Current Tax - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of uncertain tax positions within current tax [line items] |  |
Uncertain tax positions included within current tax liability | $ 24 | $ 25
Her Majesty Revenue and Customers [member] | United Kingdom [member] | Tax Uncertainties [member] |  |
Disclosure of uncertain tax positions within current tax [line items] |  |
Adjustments for current tax of prior periods | 2 | 2
2014 [member] | Internal Revenue Service [member] | United States [member] |  |
Disclosure of uncertain tax positions within current tax [line items] |  |
Assessed tax payable | 28 |
2014 [member] | Internal Revenue Service [member] | Federal [member] | United States [member] |  |
Disclosure of uncertain tax positions within current tax [line items] |  |
Adjustments for current tax of prior periods | 8 | 6
2014 [member] | Internal Revenue Service [member] | Local [member] | United States [member] |  |
Disclosure of uncertain tax positions within current tax [line items] |  |
Adjustments for current tax of prior periods | 1 | 1
Additional income tax payable | 4 |
Interest payable on additional income tax | 9 |
Interest expense on income tax | 3 | 2
Largest single contingency does not exceed [member] |  |
Disclosure of uncertain tax positions within current tax [line items] |  |
Uncertain tax positions included within current tax liability | $ 10 | $ 8

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