Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Operating Revenue:
Real estate leasing	$ 34.8	$ 31.0	$ 67.5	$ 61.9
Real estate development and sales	35.7	21.4	67.9	22.3
Materials and construction	57.4	64.5	114.3	114.7
Agribusiness	25.8	29.8	54.7	42.7
Total operating revenue	153.7	146.7	304.4	241.6
Operating Costs and Expenses:
Cost of real estate leasing	20.9	19.4	40.5	39.0
Cost of real estate development and sales	19.3	11.2	40.7	11.1
Cost of construction contracts and materials	47.6	51.8	93.4	93.9
Costs of agribusiness revenue	30.5	29.2	57.3	39.0
Selling, general and administrative	14.1	12.3	28.7	25.7
Gain on the sale of improved property	0.0	0.0	(1.9)	0.0
Total operating costs and expenses	132.4	123.9	258.7	208.7
Operating Income	21.3	22.8	45.7	32.9
Other Income and (Expense):
Income (loss) related to joint ventures	3.8	0.4	27.8	(1.2)
Reduction in KRS II carrying value	(1.5)	0.0	(1.6)	0.0
Interest income and other	0.1	0.7	0.4	1.4
Interest expense	(6.6)	(7.2)	(13.7)	(14.5)
Income From Continuing Operations Before Income Taxes	17.1	16.7	58.6	18.6
Income tax expense	7.0	6.5	22.6	7.3
Income From Continuing Operations	10.1	10.2	36.0	11.3
Income From Discontinued Operations (net of income taxes)	0.0	0.0	0.0	34.3
Net Income	10.1	10.2	36.0	45.6
Income attributable to noncontrolling interest	(0.3)	(1.0)	(0.9)	(1.4)
Net Income Attributable to A&B Shareholders	$ 9.8	$ 9.2	$ 35.1	$ 44.2
Basic Earnings Per Share:
Continuing operations attributable to A&B shareholders (in dollars per share)	$ 0.20	$ 0.19	$ 0.72	$ 0.20
Discontinued operations attributable to A&B shareholders (in dollars per share)	0.00	0.00	0.00	0.71
Basic - Net income attributable to A&B shareholders (dollars per share)	0.20	0.19	0.72	0.91
Diluted Earnings Per Share:
Continuing operations attributable to A&B shareholders (in dollars per share)	0.20	0.19	0.71	0.20
Discontinued operations attributable to A&B shareholders (in dollars per share)	0.00	0.00	0.00	0.70
Diluted - Net income attributable to A&B shareholders (dollars per share)	$ 0.20	$ 0.19	$ 0.71	$ 0.90
Weighted Average Number of Shares Outstanding:
Basic (in shares)	48.9	48.7	48.8	48.7
Diluted (in shares)	49.4	49.3	49.3	49.2
Amounts Attributable to A&B Shareholders:
Income from continuing operations, net of tax	$ 9.8	$ 9.2	$ 35.1	$ 9.9
Discontinued operations, net of tax	0.0	0.0	0.0	34.3
Net Income Attributable to A&B	$ 9.8	$ 9.2	$ 35.1	$ 44.2
Cash dividends declared per share (dollars per share)	$ 0.05	$ 0.04	$ 0.10	$ 0.08