Investment Securities - Investment Securities by Credit Rating Type (Detail) - USD ($)
$ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
$ 1,540.0
|
$ 1,526.0
|
| Fair value |
16,898.0
|
13,468.0
|
| Investment securities - Trading, at fair value |
53.0
|
0.0
|
| Investment securities - equity |
122.0
|
117.0
|
| AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
1,175.0
|
980.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Investment securities - equity |
0.0
|
0.0
|
| Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
10,671.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Investment securities - equity |
27.0
|
26.0
|
| AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
14,609.0
|
847.0
|
| Investment securities - Trading, at fair value |
53.0
|
|
| Investment securities - equity |
0.0
|
0.0
|
| A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
671.0
|
510.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Investment securities - equity |
0.0
|
0.0
|
| BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
255.0
|
266.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Investment securities - equity |
33.0
|
50.0
|
| BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
79.0
|
83.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Investment securities - equity |
30.0
|
29.0
|
| Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
1,540.0
|
1,526.0
|
| Fair value |
109.0
|
111.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Investment securities - equity |
32.0
|
12.0
|
| Tax-exempt |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
1,369.0
|
1,350.0
|
| Fair value |
796.0
|
845.0
|
| Tax-exempt | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
22.0
|
9.0
|
| Tax-exempt | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
19.0
|
| Tax-exempt | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
327.0
|
348.0
|
| Tax-exempt | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
354.0
|
375.0
|
| Tax-exempt | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
0.0
|
| Tax-exempt | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
0.0
|
| Tax-exempt | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
1,369.0
|
1,350.0
|
| Fair value |
93.0
|
94.0
|
| Private label residential MBS |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
171.0
|
176.0
|
| Fair value |
990.0
|
947.0
|
| Private label residential MBS | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
963.0
|
921.0
|
| Private label residential MBS | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
0.0
|
| Private label residential MBS | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
27.0
|
26.0
|
| Private label residential MBS | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
0.0
|
| Private label residential MBS | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
0.0
|
| Private label residential MBS | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
0.0
|
0.0
|
| Fair value |
0.0
|
0.0
|
| Private label residential MBS | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Amortized cost |
171.0
|
176.0
|
| Fair value |
0.0
|
0.0
|
| Residential MBS issued by GSEs and GNMA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
6,666.0
|
5,831.0
|
| Investment securities - Trading, at fair value |
53.0
|
|
| Residential MBS issued by GSEs and GNMA | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Residential MBS issued by GSEs and GNMA | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
5,831.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Residential MBS issued by GSEs and GNMA | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
6,666.0
|
0.0
|
| Investment securities - Trading, at fair value |
53.0
|
|
| Residential MBS issued by GSEs and GNMA | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Residential MBS issued by GSEs and GNMA | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Residential MBS issued by GSEs and GNMA | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| Residential MBS issued by GSEs and GNMA | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Investment securities - Trading, at fair value |
0.0
|
|
| U.S. Treasury securities |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
5,504.0
|
4,383.0
|
| U.S. Treasury securities | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| U.S. Treasury securities | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
4,383.0
|
| U.S. Treasury securities | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
5,504.0
|
0.0
|
| U.S. Treasury securities | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| U.S. Treasury securities | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| U.S. Treasury securities | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| U.S. Treasury securities | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| CLO |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
1,901.0
|
570.0
|
| CLO | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
190.0
|
50.0
|
| CLO | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| CLO | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
1,475.0
|
465.0
|
| CLO | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
236.0
|
55.0
|
| CLO | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| CLO | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| CLO | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Commercial MBS issued by GSEs and GNMA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
599.0
|
437.0
|
| Commercial MBS issued by GSEs and GNMA | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Commercial MBS issued by GSEs and GNMA | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
437.0
|
| Commercial MBS issued by GSEs and GNMA | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
599.0
|
0.0
|
| Commercial MBS issued by GSEs and GNMA | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Commercial MBS issued by GSEs and GNMA | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Commercial MBS issued by GSEs and GNMA | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Commercial MBS issued by GSEs and GNMA | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Corporate debt securities |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
374.0
|
386.0
|
| Corporate debt securities | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Corporate debt securities | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Corporate debt securities | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Corporate debt securities | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
79.0
|
78.0
|
| Corporate debt securities | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
217.0
|
226.0
|
| Corporate debt securities | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
78.0
|
82.0
|
| Corporate debt securities | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Other |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
68.0
|
69.0
|
| Other | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
0.0
|
| Other | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
0.0
|
1.0
|
| Other | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
11.0
|
8.0
|
| Other | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
2.0
|
2.0
|
| Other | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
38.0
|
40.0
|
| Other | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
1.0
|
1.0
|
| Other | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Fair value |
16.0
|
17.0
|
| Preferred Stock |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
63.0
|
91.0
|
| Preferred Stock | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| Preferred Stock | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| Preferred Stock | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| Preferred Stock | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| Preferred Stock | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
33.0
|
50.0
|
| Preferred Stock | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
30.0
|
29.0
|
| Preferred Stock | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
12.0
|
| Common Stock |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
32.0
|
|
| Common Stock | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
|
| Common Stock | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
|
| Common Stock | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
|
| Common Stock | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
|
| Common Stock | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
|
| Common Stock | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
|
| Common Stock | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
32.0
|
|
| CRA investments |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
27.0
|
26.0
|
| CRA investments | AAA |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| CRA investments | Split-rated AAA/AA+ |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
27.0
|
26.0
|
| CRA investments | AA+ to AA- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| CRA investments | A+ to A- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| CRA investments | BBB+ to BBB- |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| CRA investments | BB+ and below |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
0.0
|
0.0
|
| CRA investments | Unrated |
|
|
| Schedule of Held-to-Maturity Securities [Line Items] |
|
|
| Investment securities - equity |
$ 0.0
|
$ 0.0
|