Statements of Consolidated Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Net income	$ 18.6		$ 21.0		$ 52.1		$ 47.5
Reclassification adjustments:
Amortization of net actuarial loss relating to VEBAs	0.4	[1]	0.7	[1]	0.7	[1]	1.5	[1]
Amortization of prior service cost relating to VEBAs	1.0	[1]	1.1	[1]	2.1	[1]	2.1	[1]
Reclassification of unrealized gain upon sale of available for sale securities	(0.2)	[2]	0		(0.6)	[2]	0
Unrealized gain on available for sale securities	0.2		0		0.5		0.3
Foreign currency translation adjustment	0.4		0.4		0.8		0.1
Other comprehensive income, before tax	1.8		2.2		3.5		4.0
Income tax expense related to items of other comprehensive income	(0.5)		(0.7)		(1.0)		(1.4)
Other comprehensive income, net of tax	1.3		1.5		2.5		2.6
Comprehensive income	$ 19.9		$ 22.5		$ 54.6		$ 50.1

[1] Amounts reclassified out of Accumulated other comprehensive income relating to VEBA adjustments were included as a component of Selling, administrative, research and development and general expense.

[2] Amounts reclassified out of Accumulated other comprehensive income relating to sales of available for sale securities were included as a component of Other (expense) income, net.