Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating Revenue:
Total operating revenue	$ 80.8	$ 129.4
Operating Costs and Expenses:
Cost of Commercial Real Estate	24.3	19.2
Selling, general and administrative	13.8	15.5
Total operating costs and expenses	71.1	116.2
Gain (loss) on the sale of commercial real estate properties	0.5	0.0
Operating Income (Loss)	10.2	13.2
Other Income and (Expenses):
Income (loss) related to joint ventures	3.2	2.7
Interest and other income (expense), net	0.2	1.6
Interest expense	(7.8)	(9.1)
Income (Loss) from Continuing Operations Before Income Taxes	5.8	8.4
Income tax benefit (expense)	0.0	1.1
Income (Loss) from Continuing Operations	5.8	9.5
Income (loss) from discontinued operations, net of income taxes	(0.2)	(0.8)
Net Income (Loss)	5.6	8.7
Loss (income) attributable to noncontrolling interest	0.6	0.3
Net Income (Loss) Attributable to A&B Shareholders	$ 6.2	$ 9.0
Earnings (Loss) Per Share Available to A&B Shareholders:
Continuing operations available to A&B shareholders (in dollars per share)	$ 0.09	$ 0.13
Discontinued operations available to A&B shareholders (in dollars per share)	0	(0.01)
Net income (loss) available to A&B shareholders (in dollars per share)	0.09	0.12
Diluted Earnings (Loss) Per Share of Common Stock:
Continuing operations available to A&B shareholders (in dollars per share)	0.09	0.13
Discontinued operations available to A&B shareholders (in dollars per share)	0	(0.01)
Net income (loss) available to A&B shareholders (in dollars per share)	$ 0.09	$ 0.12
Weighted-Average Number of Shares Outstanding:
Basic (in shares)	72.3	72.1
Diluted (in shares)	72.5	72.5
Amounts Available to A&B Common Shareholders (Note 17):
Continuing operations available to A&B common shareholders	$ 6.4	$ 9.8
Discontinued operations available to A&B common shareholders	(0.2)	(0.8)
Net income (loss) available to A&B common shareholders	6.2	9.0
Commercial Real Estate
Operating Revenue:
Commercial Real Estate	43.4	36.8
Land Operations
Operating Revenue:
Revenues	11.5	49.0
Operating Costs and Expenses:
Operating costs	8.0	39.4
Materials & Construction
Operating Revenue:
Revenues	25.9	43.6
Operating Costs and Expenses:
Operating costs	$ 25.0	$ 42.1