Consolidated Statements of Comprehensive Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Lease revenue	$ 276.6	$ 281.8	$ 823.4	$ 847.5
Marine operating revenue	62.9	62.1	135.0	139.7
Other revenue	20.1	19.0	65.7	69.0
Total Revenues	359.6	362.9	1,024.1	1,056.2
Expenses
Maintenance expense	84.9	79.6	247.7	244.6
Marine operating expense	38.9	39.2	89.8	88.9
Depreciation	78.6	75.9	227.9	221.0
Operating lease expense	15.8	19.2	46.8	54.5
Other operating expense	8.5	10.1	25.9	33.7
Selling, general and administrative	42.8	48.1	128.8	127.8
Total Expenses	269.5	272.1	766.9	770.5
Other Income (Expense)
Gain (Loss) on Sale of Assets and Asset Impairment Charges	9.4	62.7	56.3	122.8
Interest expense, net	(40.2)	(36.2)	(119.4)	(109.9)
Other (expense) income	(2.1)	4.3	(4.5)	(2.9)
Income before Income Taxes and Share of Affiliates’ Earnings	57.2	121.6	189.6	295.7
Income Taxes	(20.4)	(41.1)	(60.3)	(98.6)
Share of Affiliates’ Earnings (net of tax)	12.2	15.2	30.6	29.1
Net Income	49.0	95.7	159.9	226.2
Other Comprehensive Income, net of taxes
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	15.4	11.0	74.0	16.2
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0.0	1.3	0.0	1.6
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0.7	0.5	3.6	(6.8)
Post-retirement benefit plans	1.4	(6.0)	4.1	(3.3)
Other comprehensive income (loss)	17.5	6.8	81.7	7.7
Comprehensive Income	$ 66.5	$ 102.5	$ 241.6	$ 233.9
Share Data
Earnings Per Share, Basic	$ 1.27	$ 2.39	$ 4.10	$ 5.55
Average number of common shares (in shares)	38.6	40.1	39.0	40.7
Earnings Per Share, Diluted	$ 1.25	$ 2.36	$ 4.04	$ 5.49
Average number of common shares and common share equivalents (in shares)	39.2	40.6	39.6	41.2
Dividends declared per common share (in dollars per share)	$ 0.42	$ 0.40	$ 1.26	$ 1.20