Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash Flows from Operating Activities:
Net income	$ 117.4	$ 103.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, and amortization of intangibles	92.5	88.7
Amortization of deferred financing costs	2.0	1.9
Share-based compensation expense	4.6	5.6
Deferred income tax provision	12.2	8.1
Pension and postretirement benefits expense, net of contributions	1.1	6.4
Excess tax benefits from stock based awards	0.3	0.0
Other, net	(1.8)	2.1
(Increase) decrease in assets —
Accounts receivable	(44.1)	5.1
Inventories	(20.9)	(15.7)
Prepaid expenses and other current assets	(15.4)	(13.9)
Increase (decrease) in liabilities —
Accounts payable	25.6	0.3
Accrued liabilities	(48.5)	(43.5)
Federal and state income taxes payable / receivable	39.1	42.2
Net cash provided by operating activities	164.1	191.0
Cash Flows from Investing Activities:
Additions to property, plant, and equipment	(57.8)	(52.9)
Proceeds from disposals	(2.9)	(2.9)
Proceeds from disposals	1.7	0.0
Other, net	1.2	0.3
Net cash used for investing activities	(57.8)	(55.5)
Cash Flows from Financing Activities:
Repayments of debt and capital lease obligations	(31.7)	(1.9)
Common stock dividends paid	(59.4)	(53.1)
Repurchases of common stock	0.0	(100.3)
Shares withheld to cover employee restricted stock taxes	(0.5)	(2.1)
Net cash used for financing activities	(91.6)	(157.4)
Net increase (decrease) in cash and cash equivalents	14.7	(21.9)
Cash and cash equivalents, beginning of period	239.3	184.2
Cash and cash equivalents, end of period	$ 254.0	$ 162.3