Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions |
Total |
Common Stock [Member] |
Additional Paid-in Capital [Member] |
Retained Earnings [Member] |
Net unrealized (loss)/gain on AFS securities [Member] |
Cash Flow Hedges [Member] |
Foreign Currency Translation [Member] |
Accumulated Other Comprehensive Loss [Member] |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning balance, Shares at May. 31, 2024 | 360.1 | |||||||||||||||
| Beginning balance at May. 31, 2024 | $ 3,801.0 | $ 3.6 | $ 1,729.5 | $ 2,213.0 | $ (120.7) | $ (24.4) | $ (145.1) | |||||||||
| Net Income (Loss) | 1,360.1 | 1,360.1 | ||||||||||||||
| Unrealized gains on securities, net of tax expense (benefit) | 55.0 | 70.9 | $ (15.9) | 55.0 | ||||||||||||
| Reclassification adjustment for realized gains (losses) on securities, net of tax expense | [1] | 7.6 | 0.3 | 7.3 | 7.6 | |||||||||||
| Cash dividends declared | (1,058.9) | (1,058.9) | ||||||||||||||
| Repurchases of common shares including excise taxes, Shares | [2] | (0.8) | ||||||||||||||
| Repurchases of common shares including excise taxes | [2] | (104.5) | $ 0.0 | (4.0) | (100.5) | |||||||||||
| Stock-based compensation costs | 50.5 | 50.5 | ||||||||||||||
| Foreign currency translation adjustment | (7.1) | (7.1) | (7.1) | |||||||||||||
| Activity related to equity-based plans, Shares | 0.9 | |||||||||||||||
| Activity related to equity-based plans | 12.9 | $ 0.0 | 38.8 | (25.9) | ||||||||||||
| Ending balance, Shares at Feb. 28, 2025 | 360.2 | |||||||||||||||
| Ending balance at Feb. 28, 2025 | 4,116.6 | $ 3.6 | 1,814.8 | 2,387.8 | (49.5) | (8.6) | (31.5) | (89.6) | ||||||||
| Beginning balance, Shares at Nov. 30, 2024 | 360.1 | |||||||||||||||
| Beginning balance at Nov. 30, 2024 | 3,925.7 | $ 3.6 | 1,789.4 | 2,224.6 | (63.1) | (28.8) | (91.9) | |||||||||
| Net Income (Loss) | 519.3 | 519.3 | ||||||||||||||
| Unrealized gains on securities, net of tax expense (benefit) | (2.6) | 13.3 | (15.9) | (2.6) | ||||||||||||
| Reclassification adjustment for realized gains (losses) on securities, net of tax expense | [1] | 7.6 | 0.3 | 7.3 | 7.6 | |||||||||||
| Cash dividends declared | (353.2) | (353.2) | ||||||||||||||
| Stock-based compensation costs | 17.6 | 17.6 | ||||||||||||||
| Foreign currency translation adjustment | (2.7) | (2.7) | (2.7) | |||||||||||||
| Activity related to equity-based plans, Shares | 0.1 | |||||||||||||||
| Activity related to equity-based plans | 4.9 | $ 0.0 | 7.8 | (2.9) | ||||||||||||
| Ending balance, Shares at Feb. 28, 2025 | 360.2 | |||||||||||||||
| Ending balance at Feb. 28, 2025 | $ 4,116.6 | $ 3.6 | 1,814.8 | 2,387.8 | (49.5) | $ (8.6) | (31.5) | (89.6) | ||||||||
| Beginning balance, Shares at May. 31, 2025 | 360.5 | 360.5 | ||||||||||||||
| Beginning balance at May. 31, 2025 | $ 4,128.0 | $ 3.6 | 1,901.1 | 2,277.0 | (38.5) | (15.2) | (53.7) | |||||||||
| Net Income (Loss) | 1,339.5 | 1,339.5 | ||||||||||||||
| Unrealized gains on securities, net of tax expense (benefit) | 51.0 | 51.0 | 51.0 | |||||||||||||
| Reclassification adjustment for realized gains (losses) on securities, net of tax expense | [3] | (5.5) | (5.5) | (5.5) | ||||||||||||
| Cash dividends declared | (1,165.0) | (1,165.0) | ||||||||||||||
| Repurchases of common shares including excise taxes, Shares | [4] | (2.9) | ||||||||||||||
| Repurchases of common shares including excise taxes | [4] | (361.6) | $ 0.0 | (13.9) | (347.7) | |||||||||||
| Stock-based compensation costs | 75.4 | 75.4 | ||||||||||||||
| Foreign currency translation adjustment | 5.5 | 5.5 | 5.5 | |||||||||||||
| Activity related to equity-based plans, Shares | 0.7 | |||||||||||||||
| Activity related to equity-based plans | $ (53.7) | $ 0.0 | 2.8 | (56.5) | ||||||||||||
| Ending balance, Shares at Feb. 28, 2026 | 358.3 | 358.3 | ||||||||||||||
| Ending balance at Feb. 28, 2026 | $ 4,013.6 | $ 3.6 | 1,965.4 | 2,047.3 | 7.0 | (9.7) | (2.7) | |||||||||
| Beginning balance, Shares at Nov. 30, 2025 | 359.0 | |||||||||||||||
| Beginning balance at Nov. 30, 2025 | 3,880.1 | $ 3.6 | 1,944.1 | 1,950.0 | (5.3) | (12.3) | (17.6) | |||||||||
| Net Income (Loss) | 560.3 | 560.3 | ||||||||||||||
| Unrealized gains on securities, net of tax expense (benefit) | 12.5 | 12.5 | 12.5 | |||||||||||||
| Reclassification adjustment for realized gains (losses) on securities, net of tax expense | [3] | (0.2) | (0.2) | (0.2) | ||||||||||||
| Cash dividends declared | (388.0) | (388.0) | ||||||||||||||
| Repurchases of common shares including excise taxes, Shares | [4] | (0.8) | ||||||||||||||
| Repurchases of common shares including excise taxes | [4] | (75.0) | $ 0.0 | (3.7) | (71.3) | |||||||||||
| Stock-based compensation costs | 23.1 | 23.1 | ||||||||||||||
| Foreign currency translation adjustment | 2.6 | 2.6 | 2.6 | |||||||||||||
| Activity related to equity-based plans, Shares | 0.1 | |||||||||||||||
| Activity related to equity-based plans | $ (1.8) | $ 0.0 | 1.9 | (3.7) | ||||||||||||
| Ending balance, Shares at Feb. 28, 2026 | 358.3 | 358.3 | ||||||||||||||
| Ending balance at Feb. 28, 2026 | $ 4,013.6 | $ 3.6 | $ 1,965.4 | $ 2,047.3 | $ 7.0 | $ (9.7) | $ (2.7) | |||||||||
| ||||||||||||||||