Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Operating Revenue:
Real estate leasing	$ 33.0	$ 31.3	$ 100.5	$ 93.2
Real estate development and sales	19.9	18.2	87.8	40.5
Materials and construction	51.0	58.4	165.3	173.1
Agribusiness	40.8	45.5	95.5	88.2
Total operating revenue	144.7	153.4	449.1	395.0
Operating Costs and Expenses:
Cost of real estate leasing	20.8	19.6	61.3	58.6
Cost of real estate development and sales	6.7	5.4	47.4	16.5
Cost of construction contracts and materials	40.7	48.0	134.1	141.9
Cost of agribusiness revenue	49.8	52.7	107.1	91.8
Selling, general and administrative	12.6	12.1	41.3	37.9
Gain on the sale of improved property	0.0	0.0	(1.9)	0.0
Total operating costs and expenses	130.6	137.8	389.3	346.7
Operating Income	14.1	15.6	59.8	48.3
Other Income and (Expense):
Income related to joint ventures	2.9	1.5	30.7	0.3
Reduction in KRS II carrying value	(0.1)	(15.1)	(1.7)	(15.1)
Interest income and other	0.4	1.1	0.8	2.6
Interest expense	(6.5)	(7.2)	(20.2)	(21.6)
Income (Loss) From Continuing Operations Before Income Taxes	10.8	(4.1)	69.4	14.5
Income tax expense (benefit)	3.8	(14.9)	26.4	(7.6)
Income From Continuing Operations	7.0	10.8	43.0	22.1
Income From Discontinued Operations, net of income taxes	0.0	0.0	0.0	34.3
Net Income	7.0	10.8	43.0	56.4
Income attributable to noncontrolling interest	(0.3)	(0.6)	(1.2)	(2.0)
Net income attributable to A&B	$ 6.7	$ 10.2	$ 41.8	$ 54.4
Basic Earnings Per Share:
Continuing operations available to A&B shareholders (in dollars per share)	$ 0.11	$ 0.21	$ 0.83	$ 0.41
Discontinued operations available to A&B shareholders (in dollars per share)	0.00	0.00	0.00	0.71
Basic - Net income available to A&B shareholders (in dollars per share)	0.11	0.21	0.83	1.12
Diluted Earnings Per Share:
Continuing operations available to A&B shareholders (in dollars per share)	0.11	0.21	0.82	0.41
Discontinued operations available to A&B shareholders (in dollars per share)	0.00	0.00	0.00	0.70
Diluted - Net income available to A&B shareholders (in dollars per share)	$ 0.11	$ 0.21	$ 0.82	$ 1.11
Weighted Average Number of Shares Outstanding:
Basic (in shares)	48.9	48.8	48.8	48.7
Diluted (in shares)	49.4	49.3	49.3	49.2
Cash dividends declared per share (in dollars per share)	$ 0.05	$ 0.04	$ 0.15	$ 0.12