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Segment reporting (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2021 | Mar. 31, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020
Disclosure Of Operating Segments [Line Items] |  |  |  |  |  |
Net interest income | $ 1,628 | $ 1,613 | $ 1,392 | $ 3,241 | $ 2,722 |
Non-interest income |  |  |  | 14,333 | 13,155 |
Income |  |  |  | 17,574 | 15,877 |
Credit loss (expense) / release | 80 | 28 | (272) | 108 | (540) |
Total operating income | 8,976 | 8,705 | 7,403 | 17,681 | 15,337 |
Total operating expenses | 6,384 | 6,407 | 5,821 | 12,790 | 11,747 |
Operating profit / (loss) before tax | 2,593 | 2,298 | 1,582 | 4,891 | 3,591 |
Tax expense / (benefit) | 581 | 471 | 347 | 1,053 | 757 |
Net profit / (loss) | 2,012 | 1,827 | $ 1,236 | 3,838 | 2,833 |
Additional information |  |  |  |  |  |
Total assets | 1,086,519 | $ 1,107,712 |  | 1,086,519 |  | $ 1,125,765
Global Wealth Management |  |  |  |  |  |
Disclosure Of Operating Segments [Line Items] |  |  |  |  |  |
Net interest income |  |  |  | 2,023 | 2,054 |
Non-interest income |  |  |  | 7,583 | 6,553 |
Income |  |  |  | 9,606 | 8,606 |
Credit loss (expense) / release | 14 |  |  | 16 | (117) |
Total operating income |  |  |  | 9,622 | 8,489 |
Total operating expenses |  |  |  | 6,918 | 6,391 |
Operating profit / (loss) before tax |  |  |  | 2,704 | 2,098 |
Additional information |  |  |  |  |  |
Total assets | 375,076 |  |  | 375,076 |  | 367,714
Personal & Corporate Banking |  |  |  |  |  |
Disclosure Of Operating Segments [Line Items] |  |  |  |  |  |
Net interest income |  |  |  | 1,039 | 1,029 |
Non-interest income |  |  |  | 1,063 | 886 |
Income |  |  |  | 2,102 | 1,914 |
Credit loss (expense) / release | 46 |  |  | 69 | (187) |
Total operating income |  |  |  | 2,171 | 1,727 |
Total operating expenses |  |  |  | 1,284 | 1,155 |
Operating profit / (loss) before tax |  |  |  | 888 | 572 |
Additional information |  |  |  |  |  |
Total assets | 221,958 |  |  | 221,958 |  | 231,657
Asset Management |  |  |  |  |  |
Disclosure Of Operating Segments [Line Items] |  |  |  |  |  |
Net interest income |  |  |  | (7) | (9) |
Non-interest income |  |  |  | 1,310 | 1,048 |
Income |  |  |  | 1,303 | 1,038 |
Credit loss (expense) / release | 0 |  |  | 0 | 0 |
Total operating income |  |  |  | 1,303 | 1,038 |
Total operating expenses |  |  |  | 820 | 724 |
Operating profit / (loss) before tax |  |  |  | 482 | 314 |
Additional information |  |  |  |  |  |
Total assets | 29,468 |  |  | 29,468 |  | 28,589
Investment Bank |  |  |  |  |  |
Disclosure Of Operating Segments [Line Items] |  |  |  |  |  |
Net interest income |  |  |  | 244 | 3 |
Non-interest income |  |  |  | 4,476 | 4,914 |
Income |  |  |  | 4,720 | 4,917 |
Credit loss (expense) / release | 21 |  |  | 23 | (200) |
Total operating income |  |  |  | 4,743 | 4,718 |
Total operating expenses |  |  |  | 3,663 | 3,396 |
Operating profit / (loss) before tax |  |  |  | 1,080 | 1,321 |
Additional information |  |  |  |  |  |
Total assets | 343,886 |  |  | 343,886 |  | 369,683
Group Functions |  |  |  |  |  |
Disclosure Of Operating Segments [Line Items] |  |  |  |  |  |
Net interest income |  |  |  | (58) | (354) |
Non-interest income |  |  |  | (99) | (246) |
Income |  |  |  | (158) | (600) |
Credit loss (expense) / release | (1) |  |  | (1) | (35) |
Total operating income |  |  |  | (158) | (635) |
Total operating expenses |  |  |  | 105 | 80 |
Operating profit / (loss) before tax |  |  |  | (263) | $ (715) |
Additional information |  |  |  |  |  |
Total assets | $ 116,130 |  |  | $ 116,130 |  | $ 128,122

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