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v3.25.2

Long-Term Debt (Narrative) (Details) $ in Millions, ¥ in Billions | 3 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2025 USD ($) | Jun. 17, 2025 USD ($) | Jun. 17, 2025 JPY (¥) | Mar. 04, 2025 USD ($)
U.S. government and agency |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Financial Instruments, Owned, US Government and Agency Obligations, at Fair Value | $ |  |  |  | $ 1,250
senior debt $1,250 M 50740% 2055 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount | $ |  |  |  | $ 1,250
Payments of Debt Issuance Costs | $ | $ 13 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 5.74%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 1.2373% |  |  |
JPY private placement senior debt $612M June 2025 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount | $ |  | $ 612 |  |
Payments of Debt Issuance Costs | $ | $ 5 |  |  |
JPY Private Placement Senior Notes 10.0 billion June 2032 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | ¥ 10.0 |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.14% | 2.14% |
JPY Private Placement Senior Notes 15.0 billion June 2035 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | ¥ 15.0 |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.46% | 2.46% |
JPY Private Placement Senior Notes 10.7 billion June 2037 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | ¥ 10.7 |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.59% | 2.59% |
JPY Private Placement Senior Notes 12.1 billion June 2040 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | ¥ 12.1 |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.83% | 2.83% |
JPY Private Placement Senior Notes 23.6 billion June 2045 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | ¥ 23.6 |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.29% | 3.29% |
JPY Private Placement Senior Notes 16.4 billion June 2055 |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  | ¥ 16.4 |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.62% | 3.62% |

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