CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Activities
Net income	$ 241.7	$ 64.8	$ 135.7
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Gain on remeasurement of investment in SunBelt	(181.4)	0	0
Earnings of non-consolidated affiliates	(9.6)	(29.9)	(37.7)
Other operating income-gains on disposition of property, plant and equipment	(6.2)	(1.1)	(6.5)
Stock-based compensation	5.8	6.7	5.8
Depreciation and amortization	99.3	86.9	71.7
Deferred taxes	92.6	11.2	72.3
Write-off of equipment and facility included in restructuring charges	0	17.5	0
Qualified pension plan contributions	(0.9)	(9.8)	(4.5)
Qualified pension plan income	(26.4)	(21.6)	(21.8)
Common stock issued under employee benefit plans	0	1.0	2.1
Change in assets and liabilities:
Receivables	(26.2)	(3.6)	29.7
Income taxes receivable	5.0	13.3	(20.0)
Inventories	(17.0)	(31.8)	7.6
Other current assets	0.6	(1.7)	3.6
Accounts payable and accrued liabilities	15.6	14.1	(43.5)
Other assets	(0.2)	2.0	(2.1)
Other noncurrent liabilities	25.6	(2.0)	10.2
Other operating activities	(2.4)	(0.5)	(2.4)
Net operating activities	215.9	115.5	200.2
Investing Activities
Capital expenditures	(200.9)	(85.3)	(137.9)
Business acquired in purchase transaction, net of cash acquired	123.4	0	0
Proceeds from sale/leaseback of equipment	3.2	0	0
Proceeds from disposition of property, plant and equipment	7.9	3.1	8.5
Distributions from affiliated companies, net	1.9	23.6	37.1
Restricted cash activity, net	50.3	(102.0)	0
Other investing activities	1.4	0.9	4.6
Net investing activities	(259.6)	(159.7)	(87.7)
Financing Activities
Long-Term Debt Borrowings	36.0	117.0	150.3
Long-Term Debt Repayments	(87.2)	(20.7)	0
Issuance of common stock	0	9.2	14.8
Common stock repurchased and retired	(4.2)	0	0
Stock options exercised	8.3	2.9	0.2
Excess tax benefits from stock options exercised	1.0	0.2	0
Dividends paid	(64.0)	(63.3)	(62.5)
Deferred debt issuance costs	0	(1.0)	(3.3)
Net financing activities	(110.1)	44.3	99.5
Net (decrease) increase in cash and cash equivalents	(153.8)	0.1	212.0
Cash and cash equivalents, beginning of year	458.6	458.5	246.5
Cash and cash equivalents, end of year	304.8	458.6	458.5
Cash paid (received) for interest and income taxes:
Interest	24.8	24.6	13.9
Income taxes, net of refunds	$ 41.5	$ (5.9)	$ 21.1