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Consolidated net cash/(debt) - Analysis of changes in consolidated net cash/(debt) (Parenthetical) (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of financial liabilities [Abstract] |  |
Borrowings | $ 14,115 | $ 12,752
Borrowings and other financial liabilities | 14,713 | 13,920
Total other current financial liabilities | 1,372 | 1,073
Other non-current financial liabilities | 13,341 | 12,847
Overdrafts | 0 | 1
Other differences to cash and cash equivalents in statement of cash flows | 117 |
Cash and cash equivalents included in Assets held for sale | 0 | 117
Highly liquid financial assets held in managed investment funds classified as held for trading | 2,584 | 2,522
Borrowings (including finance leases) Excluding Overdraft [member] |  |
Disclosure of financial liabilities [Abstract] |  |
Total other current financial liabilities |  | 761
Other current non-financial liabilities |  | 407
Over Draft |  |
Disclosure of financial liabilities [Abstract] |  |
Overdrafts | 0 | 1
Borrowings Excluding Overdrafts, Including Lease Liabilities [Member] |  |
Disclosure of financial liabilities [Abstract] |  |
Borrowings | 14,115 | 12,751
Net Other Financial Liabilities [Member] |  |
Disclosure of financial liabilities [Abstract] |  |
Total other current financial liabilities | 350 | 761
Other non-current financial liabilities | $ 248 | $ 407

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