CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Shareholders' Equity:
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00
Common stock, authorized (in shares)	120.0	120.0
Common stock, issued (in shares)	80.2	80.1
Common stock, outstanding (in shares)	80.2	80.1