XML 23 R43.htm IDEA: XBRL DOCUMENT v2.3.0.15
Stockholders' Equity (Changes in Stockholders' Equity) (Parenthetical) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Stockholders' Equity  
Amortization of actuarial losses and prior service costs (credits), income tax amount$ 3.7$ 3.0