v3.26.1
Loans and asset quality - Credit Risk Profile by Grade (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year $ 16,183,000,000 $ 15,861,000,000
Originated, at amortized cost, fiscal year before current fiscal year 3,048,000,000 1,862,000,000
Originated, at amortized cost, two years before current fiscal year 1,510,000,000 1,702,000,000
Originated, at amortized cost, three years before current fiscal year 1,566,000,000 3,355,000,000
Originated, at amortized cost, four years before current fiscal year 3,189,000,000 2,589,000,000
Originated, at amortized cost, more than five years before current fiscal year 7,954,000,000 6,269,000,000
Amortized cost 50,988,000,000 46,002,000,000
Converted to term loans – Amortized cost 175,000,000 175,000,000
Total 84,613,000,000 77,815,000,000
Accrued interest receivable 272,000,000 286,000,000
Loans 88,741,000,000 80,615,000,000
Writeoff 0  
Total wealth management loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 54,000,000 14,000,000
Originated, at amortized cost, fiscal year before current fiscal year 11,000,000 0
Originated, at amortized cost, two years before current fiscal year 0 28,000,000
Originated, at amortized cost, three years before current fiscal year 28,000,000 27,000,000
Originated, at amortized cost, four years before current fiscal year 26,000,000 52,000,000
Originated, at amortized cost, more than five years before current fiscal year 141,000,000 93,000,000
Amortized cost 9,310,000,000 9,131,000,000
Converted to term loans – Amortized cost 175,000,000 175,000,000
Total 9,745,000,000 9,520,000,000
Accrued interest receivable 51,000,000 49,000,000
Total wealth management loans | Wealth management mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 363,000,000 633,000,000
Originated, at amortized cost, fiscal year before current fiscal year 599,000,000 270,000,000
Originated, at amortized cost, two years before current fiscal year 428,000,000 647,000,000
Originated, at amortized cost, three years before current fiscal year 652,000,000 1,486,000,000
Originated, at amortized cost, four years before current fiscal year 1,440,000,000 1,724,000,000
Originated, at amortized cost, more than five years before current fiscal year 5,230,000,000 3,812,000,000
Amortized cost 9,000,000 14,000,000
Converted to term loans – Amortized cost 0 0
Total 8,721,000,000 8,586,000,000
Accrued interest receivable 23,000,000 24,000,000
Other residential mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 286,000,000 416,000,000
Originated, at amortized cost, fiscal year before current fiscal year 427,000,000 324,000,000
Originated, at amortized cost, two years before current fiscal year 96,000,000 242,000,000
Originated, at amortized cost, three years before current fiscal year 122,000,000 492,000,000
Originated, at amortized cost, four years before current fiscal year 460,000,000 171,000,000
Originated, at amortized cost, more than five years before current fiscal year 274,000,000 175,000,000
Amortized cost 0 0
Converted to term loans – Amortized cost 0 0
Total 1,665,000,000 1,820,000,000
Accrued interest receivable 10,000,000 6,000,000
Loans 1,665,000,000 1,820,000,000
Writeoff   1,000,000
Capital call financing    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 2,000,000 230,000,000
Originated, at amortized cost, fiscal year before current fiscal year 231,000,000 130,000,000
Originated, at amortized cost, two years before current fiscal year 130,000,000 0
Originated, at amortized cost, three years before current fiscal year 0 0
Originated, at amortized cost, four years before current fiscal year 0 0
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 5,169,000,000 4,976,000,000
Converted to term loans – Amortized cost 0 0
Total 5,532,000,000 5,336,000,000
Accrued interest receivable 21,000,000 24,000,000
Loans 5,532,000,000 5,336,000,000
Other    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 0 0
Originated, at amortized cost, fiscal year before current fiscal year 0 0
Originated, at amortized cost, two years before current fiscal year 0 0
Originated, at amortized cost, three years before current fiscal year 0 0
Originated, at amortized cost, four years before current fiscal year 0 7,000,000
Originated, at amortized cost, more than five years before current fiscal year 89,000,000 85,000,000
Amortized cost 4,845,000,000 4,441,000,000
Converted to term loans – Amortized cost 0 0
Total 4,934,000,000 4,533,000,000
Accrued interest receivable 8,000,000 8,000,000
Loans 4,934,000,000 4,533,000,000
Margin loans    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 14,382,000,000 12,457,000,000
Originated, at amortized cost, fiscal year before current fiscal year 0 0
Originated, at amortized cost, two years before current fiscal year 0 0
Originated, at amortized cost, three years before current fiscal year 0 0
Originated, at amortized cost, four years before current fiscal year 0 0
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 15,816,000,000 13,796,000,000
Converted to term loans – Amortized cost 0 0
Total 30,198,000,000 26,253,000,000
Accrued interest receivable 45,000,000 37,000,000
Loans 30,198,000,000 26,253,000,000
Overdrafts    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans $ 4,128,000,000 $ 2,800,000,000
Overdraft repayment period 2 days 2 days
Overdrafts | Overdrafts    
Financing Receivable, Credit Quality Indicator [Line Items]    
Loans $ 4,128,000,000 $ 2,800,000,000
Commercial Real Estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Writeoff   25,000,000
Wealth management mortgages    
Financing Receivable, Credit Quality Indicator [Line Items]    
Writeoff   1,000,000
Investment grade | Total wealth management loans | Loans receivable    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 4,000,000 14,000,000
Originated, at amortized cost, fiscal year before current fiscal year 11,000,000 0
Originated, at amortized cost, two years before current fiscal year 0 28,000,000
Originated, at amortized cost, three years before current fiscal year 28,000,000 27,000,000
Originated, at amortized cost, four years before current fiscal year 26,000,000 52,000,000
Originated, at amortized cost, more than five years before current fiscal year 141,000,000 93,000,000
Amortized cost 9,131,000,000 9,003,000,000
Converted to term loans – Amortized cost 175,000,000 175,000,000
Total 9,516,000,000 9,392,000,000
Non-investment grade | Total wealth management loans | Loans receivable    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 50,000,000 0
Originated, at amortized cost, fiscal year before current fiscal year 0 0
Originated, at amortized cost, two years before current fiscal year 0 0
Originated, at amortized cost, three years before current fiscal year 0 0
Originated, at amortized cost, four years before current fiscal year 0 0
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 179,000,000 128,000,000
Converted to term loans – Amortized cost 0 0
Total 229,000,000 128,000,000
Commercial    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 23,000,000 55,000,000
Originated, at amortized cost, fiscal year before current fiscal year 49,000,000 66,000,000
Originated, at amortized cost, two years before current fiscal year 65,000,000 45,000,000
Originated, at amortized cost, three years before current fiscal year 32,000,000 16,000,000
Originated, at amortized cost, four years before current fiscal year 16,000,000 49,000,000
Originated, at amortized cost, more than five years before current fiscal year 105,000,000 104,000,000
Amortized cost 1,512,000,000 1,413,000,000
Converted to term loans – Amortized cost 0 0
Total 1,802,000,000 1,748,000,000
Accrued interest receivable 1,000,000 1,000,000
Commercial | Investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 6,000,000 55,000,000
Originated, at amortized cost, fiscal year before current fiscal year 49,000,000 55,000,000
Originated, at amortized cost, two years before current fiscal year 54,000,000 45,000,000
Originated, at amortized cost, three years before current fiscal year 32,000,000 16,000,000
Originated, at amortized cost, four years before current fiscal year 16,000,000 49,000,000
Originated, at amortized cost, more than five years before current fiscal year 105,000,000 104,000,000
Amortized cost 1,462,000,000 1,357,000,000
Converted to term loans – Amortized cost 0 0
Total 1,724,000,000 1,681,000,000
Commercial | Non-investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 17,000,000 0
Originated, at amortized cost, fiscal year before current fiscal year 0 11,000,000
Originated, at amortized cost, two years before current fiscal year 11,000,000 0
Originated, at amortized cost, three years before current fiscal year 0 0
Originated, at amortized cost, four years before current fiscal year 0 0
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 50,000,000 56,000,000
Converted to term loans – Amortized cost 0 0
Total 78,000,000 67,000,000
Commercial real estate    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 698,000,000 1,251,000,000
Originated, at amortized cost, fiscal year before current fiscal year 1,204,000,000 699,000,000
Originated, at amortized cost, two years before current fiscal year 586,000,000 665,000,000
Originated, at amortized cost, three years before current fiscal year 657,000,000 1,324,000,000
Originated, at amortized cost, four years before current fiscal year 1,237,000,000 562,000,000
Originated, at amortized cost, more than five years before current fiscal year 2,115,000,000 2,000,000,000
Amortized cost 222,000,000 209,000,000
Converted to term loans – Amortized cost 0 0
Total 6,719,000,000 6,710,000,000
Accrued interest receivable 26,000,000 25,000,000
Commercial real estate | Investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 615,000,000 989,000,000
Originated, at amortized cost, fiscal year before current fiscal year 932,000,000 412,000,000
Originated, at amortized cost, two years before current fiscal year 498,000,000 499,000,000
Originated, at amortized cost, three years before current fiscal year 446,000,000 617,000,000
Originated, at amortized cost, four years before current fiscal year 548,000,000 343,000,000
Originated, at amortized cost, more than five years before current fiscal year 1,384,000,000 1,280,000,000
Amortized cost 138,000,000 156,000,000
Converted to term loans – Amortized cost 0 0
Total 4,561,000,000 4,296,000,000
Commercial real estate | Non-investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 83,000,000 262,000,000
Originated, at amortized cost, fiscal year before current fiscal year 272,000,000 287,000,000
Originated, at amortized cost, two years before current fiscal year 88,000,000 166,000,000
Originated, at amortized cost, three years before current fiscal year 211,000,000 707,000,000
Originated, at amortized cost, four years before current fiscal year 689,000,000 219,000,000
Originated, at amortized cost, more than five years before current fiscal year 731,000,000 720,000,000
Amortized cost 84,000,000 53,000,000
Converted to term loans – Amortized cost 0 0
Total 2,158,000,000 2,414,000,000
Financial institutions    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 375,000,000 805,000,000
Originated, at amortized cost, fiscal year before current fiscal year 527,000,000 373,000,000
Originated, at amortized cost, two years before current fiscal year 205,000,000 75,000,000
Originated, at amortized cost, three years before current fiscal year 75,000,000 10,000,000
Originated, at amortized cost, four years before current fiscal year 10,000,000 24,000,000
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 14,105,000,000 12,022,000,000
Converted to term loans – Amortized cost 0 0
Total 15,297,000,000 13,309,000,000
Accrued interest receivable 87,000,000 112,000,000
Financial institutions | Investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 279,000,000 686,000,000
Originated, at amortized cost, fiscal year before current fiscal year 491,000,000 373,000,000
Originated, at amortized cost, two years before current fiscal year 205,000,000 75,000,000
Originated, at amortized cost, three years before current fiscal year 75,000,000 10,000,000
Originated, at amortized cost, four years before current fiscal year 10,000,000 24,000,000
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 12,564,000,000 10,552,000,000
Converted to term loans – Amortized cost 0 0
Total 13,624,000,000 11,720,000,000
Financial institutions | Non-investment grade    
Financing Receivable, Credit Quality Indicator [Line Items]    
Originated, at amortized cost, current fiscal year 96,000,000 119,000,000
Originated, at amortized cost, fiscal year before current fiscal year 36,000,000 0
Originated, at amortized cost, two years before current fiscal year 0 0
Originated, at amortized cost, three years before current fiscal year 0 0
Originated, at amortized cost, four years before current fiscal year 0 0
Originated, at amortized cost, more than five years before current fiscal year 0 0
Amortized cost 1,541,000,000 1,470,000,000
Converted to term loans – Amortized cost 0 0
Total $ 1,673,000,000 $ 1,589,000,000