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v3.23.2

Short-term Financing (Narrative) (Details) - USD ($) $ in Millions |  |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 26, 2023 | Jun. 15, 2023 | Jun. 09, 2023 | Jun. 01, 2023 | Feb. 03, 2023 | Sep. 17, 2021 | Feb. 06, 2020 | May 31, 2023 | May 31, 2022
2020 Credit Facility [Member] | PNC Bank, National Association [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  | $ 250.0 |  |  |  |  |
Term of unsecured line of credit facility |  |  |  |  |  | 3 years |  |  |  |  |
Expiration date |  |  |  |  |  | Feb. 06, 2026 |  | Feb. 06, 2023 |  |  |
Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 2,000.0 |  |
Revolving Credit Facility [Member] | JPM $1 Billion Credit Facility [Member] | JP Morgan Chase Bank, N.A. [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 1,000.0 |  | $ 1,000.0 | [1] |
Expiration date | [1] |  |  |  |  |  |  |  | Jul. 31, 2024 |  |
Revolving Credit Facility [Member] | JPM $500 Million Credit Facility [Member] | JP Morgan Chase Bank, N.A. [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | 500.0 |  |  |  |
Revolving Credit Facility [Member] | JPM $750 Million Credit Facility [Member] | JP Morgan Chase Bank, N.A. [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 750.0 |  | $ 750.0 | [1] |
Expiration date |  |  |  |  |  |  | Sep. 17, 2026 |  | Sep. 17, 2026 | [1] |
Standby Letters of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  |  |  | $ 141.7 |  | $ 140.2
Amounts outstanding |  |  |  |  |  |  |  |  | $ 0.0 |  | $ 0.0
Standby Letters of Credit [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date |  | Jun. 26, 2023 | Jun. 15, 2023 | Jun. 09, 2023 |  |  |  |  |  |  |
Renewal term |  |  |  |  | 1 year |  |  |  |  |  |
Minimum [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commitment fee, percentage |  |  |  |  |  |  |  |  | 0.05% |  |
Minimum [Member] | Standby Letters of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date |  |  |  |  |  |  |  |  | Jun. 09, 2023 |  |
Maximum [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Commitment fee, percentage |  |  |  |  |  |  |  |  | 0.15% |  |
Maximum [Member] | Standby Letters of Credit [Member] |  |  |  |  |  |  |  |  |  |  |
Financing [Line Items] |  |  |  |  |  |  |  |  |  |  |
Expiration date |  |  |  |  |  |  |  |  | May 25, 2024 |  |
[1] | JPM acts as the administrative agent for this syndicated credit facility.

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