v3.26.1
Accumulated Other Comprehensive Income (Loss) - Changes in AOCI (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance $ 56,905 $ 48,206 $ 56,115 $ 47,664
Foreign currency translation adjustments [1] 28 436 (111) 663
Balance Ending 57,840 49,306 57,840 49,306
Accumulated Other Comprehensive Income (Loss) [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (678) (951) (545) (1,178)
Foreign currency translation adjustments [2] 28 436 (111) 663
Change in BlackRock, Inc.'s ownership interest (3) 0 3 0
Balance Ending $ (653) $ (515) $ (653) $ (515)
[1] Amounts for the six months ended June 30, 2026 and 2025 include a gain from a net investment hedge of $24 million (net of tax expense of $7 million) and a loss from a net investment hedge of $96 million (net of tax benefit of $30 million), respectively.
[2] Amounts for the three months ended June 30, 2026 and 2025 include a gain from a net investment hedge of $7 million (net of tax expense of $2 million) and a loss from a net investment hedge of $62 million (net of tax benefit of $19 million), respectively. Amounts for the six months ended June 30, 2026 and 2025 include a gain from a net investment hedge of $24 million (net of tax expense of $7 million) and a loss from a net investment hedge of $96 million (net of tax benefit of $30 million), respectively.