Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Revenue:
Real estate leasing	$ 125.2	$ 78.8	$ 64.2
Real estate development and sales	80.0	85.4	15.0
Materials and construction	234.3	54.9	0
Agribusiness	120.5	146.1	182.3
Total operating revenue	560.0	365.2	261.5
Operating Costs and Expenses:
Cost of real estate leasing	78.3	48.4	38.4
Cost of real estate sales	41.0	46.7	5.2
Cost of materials and construction contracts	191.3	47.6	0
Cost of agribusiness goods and services	131.9	136.8	161.0
Selling, general and administrative	52.9	41.2	37.7
Gain on the sale of agricultural parcel	0	0	(7.3)
Gain on charitable donation of appreciated land	0	0	(9.4)
Impairment of real estate assets (Santa Barbara)	0	0	5.1
Separation/acquisition costs	0	4.6	6.8
Total operating costs and expenses	495.4	325.3	237.5
Operating Income	64.6	39.9	24.0
Other Income and (Expense):
Income (loss) related to joint ventures	2.1	4.3	(4.4)
Gain on insurance proceeds	0	2.4	0
Impairment and equity losses related to joint ventures	(0.3)	(6.6)	(4.7)
Reduction in KRS II carrying value, net (Note 6, 13)	(14.7)	0	0
Interest income and other	6.1	2.7	0.1
Interest expense	(29.0)	(19.1)	(14.9)
Income From Continuing Operations Before Income Taxes	28.8	23.6	0.1
Income tax expense (benefit)	(1.4)	11.1	(5.9)
Income From Continuing Operations	30.2	12.5	6.0
Income from discontinued operations, net of income taxes (Note 5)	34.3	22.3	12.8
Net Income	64.5	34.8	18.8
Income attributable to non-controlling interest	(3.1)	(0.5)	0
Net Income Attributable to A&B	61.4	34.3	18.8
Basic Earnings per Share of Common Stock:
Continuing operations attributable to A&B shareholders (in dollars per share)	$ 0.56	$ 0.27	$ 0.14
Discontinued operations attributable to A&B shareholders (in dollars per share)	$ 0.70	$ 0.50	$ 0.30
Net income attributable to A&B shareholders (in dollars per share)	$ 1.26	$ 0.77	$ 0.44
Diluted Earnings per Share of Common Stock:
Continuing operations attributable to A&B shareholders (in dollars per share)	$ 0.55	$ 0.26	$ 0.14
Discontinued operations attributable to A&B shareholders (in dollars per share)	$ 0.70	$ 0.50	$ 0.30
Net income attributable to A&B shareholders (in dollars per share)	$ 1.25	$ 0.76	$ 0.44
Weighted Average Number of Shares Outstanding:
Basic (in shares)	48.7	44.4	42.6
Diluted (in shares)	49.3	45.1	42.9
Amounts Attributable to A&B Shareholders:
Income from continuing operations, net of tax	27.1	12.0	6.0
Discontinued operations, net of tax	34.3	22.3	12.8
Net Income Attributable to A&B	$ 61.4	$ 34.3	$ 18.8