Statement of Consolidated Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 40.3		$ 52.1
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of property, plant and equipment	14.3		13.1
Amortization of definite-lived intangible assets	0.8		0.9
Amortization of debt discount and debt issuance costs	5.8		5.4
Deferred income taxes	22.4		26.1
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	(0.8)		(0.9)
Non-cash equity compensation	4.5		4.7
Non-cash unrealized (gains) losses on derivative positions	4.9		(5.4)
Non-cash impairment charges	0.2		0
Losses on disposition of property, plant and equipment	0.1		0.1
Gain on disposition of available for sale securities	0		(0.3)
Non-cash net periodic pension benefit income relating to VEBAs	(11.7)		(11.3)
Other non-cash changes in assets and liabilities	0.3		(2.5)
Changes in operating assets and liabilities:
Trade and other receivables	(0.9)		(4.5)
Inventories	16.3		(16.9)
Prepaid expenses and other current assets1	(2.1)	[1]	(1.7)
Accounts payable	12.2		9.1
Accrued liabilities	(10.2)	[1]	(0.2)
Annual variable cash contributions to VEBAs	(16.0)		(20.0)
Payable to affiliate	0		(7.9)
Long-term assets and liabilities, net1	0.7	[1]	(1.8)
Net cash provided by operating activities	71.3		48.9
Cash flows from investing activities:
Capital expenditures	(30.1)		(26.0)
Purchase of available for sale securities	(23.4)		(98.2)
Proceeds from disposition of available for sale securities	25.0		135.7
Change in restricted cash	0		0.7
Net cash (used in) provided by investing activities	(28.5)		12.2
Cash flows from financing activities:
Excess tax benefit upon vesting of non-vested shares and dividend payment on unvested shares expected to vest	0.8		0.9
Cancellation of shares to cover employees’ tax withholdings upon vesting of non-vested shares	(2.4)		(2.2)
Repurchase of common stock	(23.7)		(39.9)
Cash dividend paid to stockholders	(12.8)		(11.6)
Net cash used in financing activities	(38.1)		(52.8)
Net increase in cash and cash equivalents during the period	4.7		8.3
Cash and cash equivalents at beginning of period	169.5		273.4
Cash and cash equivalents at end of period	$ 174.2		$ 281.7

[1] Excludes the reclassification of derivatives relating to the Convertible Notes from long-term to current as the amounts have no impact on cash flow - see Note 3 and Note 9.