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Changes in consolidated statements of comprehensive income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Changes in consolidated statements of comprehensive income [line items] |  |  |
Net investment hedge | $ 91 | $ 216 | $ (201)
Net actuarial gains/losses from defined benefit plans, net of taxes | (103) | 1,809 | 143
Currency translation effects | (450) | (4,762) | 3,194
Income tax relating to components of other comprehensive income | (43) | (317) |
Fair value adjustments on financial instruments [member] |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Value adjustments on comprehensive income at beginning of period | 188 | 220 | 120
Total value adjustments | (382) | 194 | 250
Fair value adjustments related to divestments |  | (62) |
Value adjustments on comprehensive income at end of period | (198) | 188 | 220
Fair value adjustments on equity securities |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Fair value adjustments on equity securities, net of taxes | (382) | 194 | 250
Fair value adjustments on equity securities sold, reclassified to retained earnings | (4) | (164) | (150)
Income tax relating to components of other comprehensive income | 81 | (44) | (36)
Fair value adjustments on equity securities sold |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Income tax relating to components of other comprehensive income | 0 | 48 |
Value adjustments related to divestments |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Income tax relating to components of other comprehensive income | (4) |  |
Net investment hedge |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Income tax relating to components of other comprehensive income | (30) | 33 |
Actuarial gains/losses from defined benefit plans |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Value adjustments on comprehensive income at beginning of period | (3,968) | (5,773) | (5,919)
Net actuarial gains/losses from defined benefit plans, net of taxes | (104) | 1,808 | 145
Total value adjustments | (104) | 1,808 | 145
Fair value adjustments related to divestments | 34 | (3) | 2
Impact of change in ownership of consolidated entities |  |  | (1)
Value adjustments on comprehensive income at end of period | (4,038) | (3,968) | (5,773)
Income tax relating to components of other comprehensive income | (104) | (323) | (3)
Cumulative currency translation effects |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Value adjustments on comprehensive income at beginning of period | (407) | 4,134 | 1,142
Net investment hedge | 91 | 216 | (201)
Currency translation effects | (444) | (4,757) | 3,193
Total value adjustments | (353) | (4,541) | 2,992
Value adjustments on comprehensive income at end of period | (760) | (407) | 4,134
Income tax relating to components of other comprehensive income | 18 | 17 | 10
Cumulative currency translation gains/losses recycled through income statement | 13 | 3,200 | 0
Total value adjustments |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Value adjustments on comprehensive income at beginning of period | (4,187) | (1,419) | (4,657)
Fair value adjustments on equity securities, net of taxes | (382) | 194 | 250
Net investment hedge | 91 | 216 | (201)
Net actuarial gains/losses from defined benefit plans, net of taxes | (104) | 1,808 | 145
Currency translation effects | (444) | (4,757) | 3,193
Total value adjustments | (839) | (2,539) | 3,387
Fair value adjustments on equity securities sold, reclassified to retained earnings | (4) | (164) | (150)
Fair value adjustments related to divestments | 34 | (65) | 2
Impact of change in ownership of consolidated entities |  |  | (1)
Value adjustments on comprehensive income at end of period | (4,996) | (4,187) | (1,419)
Non-controlling interests [member] |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Value adjustments on comprehensive income at beginning of period | (33) | (29) | (29)
Net actuarial gains/losses from defined benefit plans, net of taxes | 1 | 1 | (2)
Currency translation effects | (6) | (5) | 1
Total value adjustments | (5) | (4) | (1)
Impact of change in ownership of consolidated entities |  |  | 1
Value adjustments on comprehensive income at end of period | (38) | (33) | (29)
Total fair value adjustments [member] |  |  |
Changes in consolidated statements of comprehensive income [line items] |  |  |
Value adjustments on comprehensive income at beginning of period | (4,220) | (1,448) | (4,686)
Fair value adjustments on equity securities, net of taxes | (382) | 194 | 250
Net investment hedge | 91 | 216 | (201)
Net actuarial gains/losses from defined benefit plans, net of taxes | (103) | 1,809 | 143
Currency translation effects | (450) | (4,762) | 3,194
Total value adjustments | (844) | (2,543) | 3,386
Fair value adjustments on equity securities sold, reclassified to retained earnings | (4) | (164) | (150)
Fair value adjustments related to divestments | 34 | (65) | 2
Value adjustments on comprehensive income at end of period | $ (5,034) | $ (4,220) | $ (1,448)

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