CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating Activities
Net income	$ 149.6	$ 241.7	$ 64.8
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Gain on remeasurement of investment in SunBelt	0	(181.4)	0
Earnings of non-consolidated affiliates	(3.0)	(9.6)	(29.9)
Gains on disposition of property, plant and equipment	(2.1)	(6.2)	(1.1)
Stock-based compensation	6.2	5.8	6.7
Depreciation and amortization	110.9	99.3	86.9
Deferred taxes	42.5	92.6	11.2
Write-off of equipment and facility included in restructuring charges	0	0	17.5
Qualified pension plan contributions	(0.9)	(0.9)	(9.8)
Qualified pension plan income	(24.8)	(26.4)	(21.6)
Change in assets and liabilities:
Receivables	1.2	(26.2)	(3.6)
Income taxes receivable/payable	0.1	5.0	13.3
Inventories	17.9	(17.0)	(31.8)
Other current assets	(0.1)	0.6	(1.7)
Accounts payable and accrued liabilities	(0.7)	15.6	14.1
Other assets	0.3	(0.2)	2.0
Other noncurrent liabilities	(17.9)	25.6	(2.0)
Other operating activities	0	(2.4)	0.5
Net operating activities	279.2	215.9	115.5
Investing Activities
Capital expenditures	(255.7)	(200.9)	(85.3)
Business acquired in purchase transaction, net of cash acquired	(310.4)	(123.4)	0
Proceeds from sale/leaseback of equipment	4.4	3.2	0
Proceeds from disposition of property, plant and equipment	8.6	7.9	3.1
Distributions from affiliated companies, net	1.3	1.9	23.6
Restricted cash activity, net	39.8	50.3	(102.0)
Other investing activities	(0.4)	1.4	0.9
Net investing activities	(512.4)	(259.6)	(159.7)
Financing Activities
Long-Term Debt Borrowings	200.0	36.0	117.0
Long-Term Debt Repayments	(19.9)	(87.2)	(20.7)
Earn out payment - SunBelt	(15.3)	0	0
Issuance of common stock	0	0	9.2
Common stock repurchased and retired	(3.1)	(4.2)	0
Stock options exercised	1.3	8.3	2.9
Excess tax benefits from stock-based compensation	0.7	1.0	0.2
Dividends paid	(64.1)	(64.0)	(63.3)
Deferred debt issuance costs	(6.0)	0	(1.0)
Net financing activities	93.6	(110.1)	44.3
Net (decrease) increase in cash and cash equivalents	(139.6)	(153.8)	0.1
Cash and cash equivalents, beginning of year	304.8	458.6	458.5
Cash and cash equivalents, end of year	165.2	304.8	458.6
Cash paid (received) for interest and income taxes:
Interest	22.2	24.8	24.6
Income taxes, net of refunds	$ 28.4	$ 41.5	$ (5.9)