Shares and Preferred Shares Shares and Preferred Shares (Tables)

3 Months Ended

Jun. 30, 2026

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

	Three Months Ended June 30,
(shares in millions)	2026	2025
Weighted average shares outstanding—basic	97.6	98.4
Dilutive effect of share equivalents	0.3	0.5
Weighted average shares outstanding and share equivalents—diluted	97.9	98.8

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

Options to purchase the following number of shares were outstanding but excluded from the computation of diluted earnings per share because the combined exercise prices, unamortized fair values, and assumed tax benefits upon exercise were greater than the average market price for the shares during the periods, so including these options would be anti-dilutive:

	Three Months Ended June 30,
(shares in millions)	2026	2025
Number of share options	1.0	0.6