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Debt and Credit Facilities (Narrative) (Details) - USD ($) $ in Millions | Nov. 30, 2025 | Mar. 31, 2025 | Feb. 28, 2025 | Dec. 31, 2024
--- | --- | --- | --- | ---
Long-term debt excluding current maturities |  | $ 3,919.6 |  | $ 4,318.1
Short-term borrowings and current maturities of long-term debt |  | 851.7 |  | 452.2
Debt Instrument, Fair Value Disclosure |  | 4,700.0 |  | 4,600.0
Commercial Paper [Member] |  |  |  |
Short-term borrowings and current maturities of long-term debt |  | 0.0 |  | 0.0
Debentures With Put Feature [Member] |  |  |  |
Short-term borrowings and current maturities of long-term debt |  | 295.0 |  | 295.0
Debentures with put option available to be exercised | $ 257.8 |  | $ 37.2 |
Three Point Five Percent Senior notes Due Two Thousand Twenty Six [Member] |  |  |  |
Long-term debt excluding current maturities |  | $ 0.0 |  | $ 399.4
Debt Instrument, Interest Rate, Stated Percentage |  | 3.50% |  | 3.50%
Three Point Eight Percent Senior Notes Due Two Thousand Twenty Nine [Member] |  |  |  |
Long-term debt excluding current maturities |  | $ 747.3 |  | $ 747.1
Debt Instrument, Interest Rate, Stated Percentage |  | 3.80% |  | 3.80%
Four Point Five Percent Senior Notes Due Two Thousand Forty Nine [Member] |  |  |  |
Long-term debt excluding current maturities |  | $ 346.4 |  | $ 346.3
Debt Instrument, Interest Rate, Stated Percentage |  | 4.50% |  | 4.50%
5.75% Senior notes due 2043 [Member] |  |  |  |
Long-term debt excluding current maturities |  | $ 495.7 |  | $ 495.7
Debt Instrument, Interest Rate, Stated Percentage |  | 5.75% |  | 5.75%
Four Point Six Five Percent Senior Notes due Twenty Forty Four [Member] |  |  |  |
Long-term debt excluding current maturities |  | $ 296.8 |  | $ 296.7
Debt Instrument, Interest Rate, Stated Percentage |  | 4.65% |  | 4.65%
Commercial Paper [Member] |  |  |  |
Line of credit facility, amount outstanding |  | $ 2,000.0 |  |
Revolving Credit Facility [Member] |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 2,000.0 |  | $ 2,000.0
2026 Revolving Credit Facility |  |  |  |
Line of credit facility, amount outstanding |  | 1,000.0 |  |
2027 Revolving Credit Facility |  |  |  |
Line of credit facility, amount outstanding |  | $ 1,000.0 |  |

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