Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues
Lease Income	$ 518.7	$ 359.6
Non-dedicated engine revenue	22.1	21.5
Other Operating Income	42.9	40.5
Total Revenues	583.7	421.6
Total expenses (1)
Maintenance expense	140.7	103.5
Depreciation expense	169.2	103.6
Operating lease expense	7.4	7.6
Other operating expense	21.8	16.0
Selling, general and administrative expense	71.3	56.6
Total expenses (1)	410.4	287.3
Other Income (Expense)
Net gain on asset dispositions	51.0	33.4
Interest (expense) income, net	(151.0)	(94.9)
Other (expense) income	6.2	(2.7)
Loss before Income Taxes	79.5	70.1
Income taxes	(21.2)	(16.6)
Share of affiliates' earnings, net of taxes	20.8	25.1
Net Income	79.1	78.6
Net loss	(6.4)	0.0
Net income	$ 85.5	$ 78.6
GATX Share Data
Basic earnings per share (in dollars per share)	$ 2.35	$ 2.15
Denominator for basic earnings per share — weighted average shares	35.7	35.9
Diluted earnings per share (in dollars per share)	$ 2.35	$ 2.15
Weighted Average Number of Shares Outstanding, Diluted	35.8	36.0