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New Standards and Interpretations Adopted in the Current Year - Summary of financial assets classified into appropriate IFRS 9 categories (Detail) $ in Millions | Jan. 01, 2018 USD ($)
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Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | $ 1,300
Revaluation of funds | 1
Opening balance – IFRS 9 (including expected credit losses and revaluation of funds) | 15,282
IAS 39 [member] |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 15,288
IFRS 9 [member] |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 15,288
Impairment provision resulting from the application of the ECL model | (7)
IFRS 9 [member] | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 10,707
IFRS 9 [member] | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 46
IFRS 9 [member] | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 4,535
IAS 39 Classification Loans Receivable Held To Maturity | IAS 39 [member] |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 1,482
IAS 39 Classification Loans Receivable Held To Maturity | Other Investment Including Loans | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassification of a financial asset from held to maturity to FVPL | 6
IAS 39 Classification Loans Receivable Held To Maturity | Cash and cash equivalents [member] | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | 7,813
IAS 39 Classification Loans Receivable Held To Maturity | Trade And Other Receivable | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | 1,316
IAS 39 Classification Loans Receivable Held To Maturity | Investments In Equity Shares And Funds | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | 90
IAS 39 Classification Loans Receivable Held To Maturity | IAS 39 [member] |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 136
IAS 39 Classification Loans Receivable Held To Maturity | Investments In Equity Shares And Funds | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | (90)
IAS 39 Classification Loans Receivable Held To Maturity | IAS 39 [member] |
Disclosure Of Financial Instruments [Line Items] |
Financial Assets | 13,670
IAS 39 Classification Loans Receivable Held To Maturity | Other Investment Including Loans | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassification of a financial asset from held to maturity to FVPL | (6)
IAS 39 Classification Loans Receivable Held To Maturity | Cash and cash equivalents [member] | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | (7,813)
IAS 39 Classification Loans Receivable Held To Maturity | Trade And Other Receivable | IFRS 9 Classification Amortised Cost |
Disclosure Of Financial Instruments [Line Items] |
Reclassifcation of money market funds from amortised cost to FVPL | $ (1,316)

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