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Revenue - Amounts Received and Not Yet Recognized Related to Performance Obligations (Detail) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
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Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | $ 1,506 | $ 1,357
Due within one year [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 572 | 490
Between 1 and 2 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 288 | 250
Between 2 and 3 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 184 | 161
Between 3 and 4 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 128 | 117
Between 4 and 5 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 95 | 89
More than 5 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 239 | 250
Loyalty and co-brand [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 1,258 | 1,145
Loyalty and co-brand [member] | Due within one year [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 502 | 433
Loyalty and co-brand [member] | Between 1 and 2 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 257 | 221
Loyalty and co-brand [member] | Between 2 and 3 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 158 | 137
Loyalty and co-brand [member] | Between 3 and 4 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 106 | 95
Loyalty and co-brand [member] | Between 4 and 5 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 75 | 69
Loyalty and co-brand [member] | More than 5 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 160 | 190
Other [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 248 | 212
Other [member] | Due within one year [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 70 | 57
Other [member] | Between 1 and 2 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 31 | 29
Other [member] | Between 2 and 3 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 26 | 24
Other [member] | Between 3 and 4 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 22 | 22
Other [member] | Between 4 and 5 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | 20 | 20
Other [member] | More than 5 years [member] |  |
Disclosure of transaction price allocated to remaining performance obligations [line items] |  |
Transaction price allocated to remaining performance obligations | $ 79 | $ 60

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of the transaction price allocated to the performance obligations that are unsatisfied (or partially unsatisfied) as of the end of the reporting period. The transaction price is the amount of consideration to which an entity expects to be entitled in exchange for transferring promised goods or services to a customer, excluding amounts collected on behalf of third parties (for example, some sales taxes). [Refer: Performance obligations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2018-01-01 -Paragraph 120 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=15&date=2018-03-01&anchor=para_120_a&doctype=Standard -URIDate 2018-03-16 + Details
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