Consolidated Statements of Equity Parenthetical (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Change in value of marketable securities and cash flow hedges, tax	$ (0.60)	$ (0.10)	$ 0.80
Pension and OPEB adjustments, tax	$ 60.7	$ (11.4)	$ (4.6)
Cash dividends, declared and paid, in dollars per share	$ 0.59	$ 0.28	$ 0.5