Earnings Per Share (“EPS”) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Income from continuing operations, net of tax	$ 10.1	$ 10.2	$ 36.0	$ 11.3
Income attributable to noncontrolling interest	(0.3)	(1.0)	(0.9)	(1.4)
Income from continuing operations attributable to A&B shareholders, net of tax	$ 9.8	$ 9.2	$ 35.1	$ 9.9
Shares used to compute basic and diluted earnings per share [Abstract]
Denominator for basic EPS - weighted average shares (in shares)	48,900,000	48,700,000	48,800,000	48,700,000
Effect of dilutive securities:
Employee/director stock options and restricted stock units (in shares)	500,000	600,000	500,000	500,000
Denominator for diluted EPS - weighted average shares (in shares)	49,400,000	49,300,000	49,300,000	49,200,000
Anti-dilutive securities excluded from the computation of weighted average dilutive shares outstanding (in shares)	0	0	0	0