Acquisitions and Divestitures (Tables)

6 Months Ended

Jun. 30, 2013

Business Combinations [Abstract]

Acquisition and divestiture activity

The Company's acquisition and divestiture activity is summarized below:

	Three Months Ended June 30,				Six Months Ended June 30,
	2013		2012		2013		2012
	(in millions)
Acquisition:
Purchase price	$	29.6	$	2.0	$	83.4	$	2.0
Net cash paid	$	28.1	$	—	$	37.2	$	—
Goodwill recorded	$	7.0	$	0.8	$	9.5	$	0.8
Divestiture:
Proceeds	$	—	$	2.1	$	35.6	$	2.1
Gain recognized	$	0.1	$	1.5	$	12.5	$	1.5
Goodwill charged off	$	—	$	0.1	$	4.8	$	0.1

Assets and liabilities classified as held for sale and discontinued operations and condensed results of operations for the ready-mix concrete operations

Further, assets and liabilities related to the discontinued operations have been classified as Assets/Liabilities Held for Sale and Discontinued Operations in the accompanying consolidated balance sheets as follows:

	June 30, 2013		December 31, 2012
	(in millions)
Assets of Ready-Mix Concrete Operations:
Inventories	$	—	$	4.5
Property, plant, and equipment, net	—		16.9
Goodwill	—		6.3
Other	—		0.2
	$	—	$	27.9
Liabilities of Ready-Mix Concrete Operations:
Debt	$	—	$	3.7
	$	—	$	3.7

Condensed results of operations for the ready-mix concrete operations for the three and six months endedJune 30, 2013 and 2012 are as follows:

	Three Months Ended June 30,					Six Months Ended June 30,
	2013			2012		2013			2012
	(in millions)
Revenues	$	—		$	32.8	$	31.6		$	61.9
Income (loss) from discontinued operations before income taxes	$	(1.6	)	$	2.3	$	(2.3	)	$	2.1
Income tax expense (benefit)	(0.5		)	0.9		(0.8		)	0.8
Net income (loss) from discontinued operations	$	(1.1	)	$	1.4	$	(1.5	)	$	1.3