Condensed Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Operating Activities
Net income	$ 38.7	$ 133.7
Adjustments to reconcile net income to net cash and cash equivalents provided by (used for) operating activities:
Gain on remeasurement of investment in SunBelt	0	(181.4)
Earnings of non-consolidated affiliates	(0.2)	(7.0)
Other operating income - gains on disposition of property, plant and equipment	(0.1)	(1.0)
Stock-based compensation	1.4	1.4
Depreciation and amortization	25.5	23.2
Deferred income taxes	12.6	84.5
Qualified pension plan contributions	(0.2)	(0.2)
Qualified pension plan income	(5.9)	(6.6)
Change in assets and liabilities:
Receivables	(42.8)	(45.8)
Inventories	(9.4)	(20.1)
Other current assets	(3.9)	(2.1)
Accounts payable and accrued liabilities	(16.2)	3.4
Income taxes payable	1.2	0.2
Other assets	1.5	(0.6)
Other noncurrent liabilities	2.5	0.5
Other operating activities	(0.3)	(2.3)
Net operating activities	4.4	(20.2)
Investing Activities
Capital expenditures	(75.9)	(25.6)
Business acquired in purchase transaction, net of cash acquired	0	(123.4)
Proceeds from sale/leaseback of equipment	1.0	0
Proceeds from disposition of property, plant and equipment	0.2	1.8
Distributions from affiliated companies, net	0	0.6
Restricted cash activity	17.6	2.9
Other investing activities	0.3	1.3
Net investing activities	(56.8)	(142.4)
Financing Activities
Earn out payment - SunBelt	(15.3)	0
Common stock repurchased and retired	(1.2)	0
Stock options exercised	0.3	0.3
Excess tax benefits from stock-based compensation	0.4	0
Dividends paid	(16.0)	(15.9)
Net financing activities	(31.8)	(15.6)
Net decrease in cash and cash equivalents	(84.2)	(178.2)
Cash and cash equivalents, beginning of period	304.8	458.6
Cash and cash equivalents, end of period	220.6	280.4
Cash paid for interest and income taxes:
Interest	7.5	7.5
Income taxes, net of refunds	7.1	1.3
Non-cash investing activities:
Capital expenditures included in accounts payable and accrued liabilities	$ 20.7	$ 1.6