Consolidated Statements of Cash Flows - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash Flows from Operating Activities:
Net income		$ 436.8	$ 392.6	$ 441.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion, and amortization of intangibles and deferred financing costs		364.3	390.8	217.9
Share-based compensation expense		18.2	15.6	14.8
Deferred income tax provision (benefit)		1.7	2.6	(160.3)
Alternative energy tax credits		0.0	0.0	76.3
Loss on disposals of property, plant, and equipment		0.5	7.0	9.4
Pension and post retirement benefits expense, net of contributions		31.2	25.4	18.5
Other, net		(20.3)	(0.9)	(1.0)
Decrease (increase) in assets —
Accounts receivable		9.5	(8.5)	(31.2)
Inventories		(11.9)	(72.4)	25.0
Prepaid expenses and other current assets		4.1	(5.1)	(1.9)
Increase (decrease) in liabilities —
Accounts payable		(37.3)	(36.0)	54.2
Accrued liabilities		(15.5)	7.0	(22.1)
Federal and state income tax payable/receivable		(18.7)	18.0	(32.7)
Net cash provided by operating activities		762.6	736.1	608.2
Cash Flows from Investing Activities:
Additions to property, plant, and equipment	[1]	(314.5)	(420.2)	(234.4)	[2]
Proceeds from sale of a business		23.0	0.0	0.0
Acquisitions of businesses, net of cash acquired		0.0	(20.5)	(1,174.5)
Additions to other long term assets		(12.3)	(12.5)	(3.1)
Other		5.7	2.1	0.6
Net cash used for investing activities		(298.1)	(451.1)	(1,411.4)
Cash Flows from Financing Activities:
Proceeds from issuance of debt		0.0	398.9	1,998.1
Repayments of debt		(47.6)	(592.5)	(1,074.8)
Financing costs paid		0.0	(3.4)	(19.4)
Common stock dividends paid		(200.8)	(157.4)	(109.1)
Repurchases of common stock		(154.7)	0.0	(7.8)
Proceeds from exercise of stock options		0.0	3.7	2.9
Excess tax benefits from stock-based awards		6.0	12.2	7.8
Shares withheld to cover employee restricted stock taxes		(8.7)	(13.2)	(11.0)
Other		0.6	0.6	0.1
Net cash (used for) provided by financing activities		(405.2)	(351.1)	786.8
Net increase (decrease) in cash and cash equivalents		59.3	(66.1)	(16.4)
Cash and cash equivalents, beginning of year		124.9	191.0	207.4
Cash and cash equivalents, end of year		$ 184.2	$ 124.9	$ 191.0

[1] Includes "Additions to property, plant, and equipment" and excludes cash used for "Acquisitions of businesses, net of cash acquired" as reported on our Consolidated Statements of Cash Flows.

[2] On October 25, 2013, we acquired Boise Inc. (Boise). Our financial results include Boise subsequent to acquisition.