CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012
Statement of Financial Position [Abstract]
Common stock, shares authorized	250.0		250.0
Common stock, par value	$ 1		$ 1
Common stock, shares issued	104.0	[1]	104.0	[1]
Common stock, shares outstanding	90.6	[1]	92.1	[1]
Unvested restricted common stock including in shares issued and outstanding	0		0.2

[1] Shares issued and outstanding include unvested restricted common stock of 0.2 at December 31, 2012. Shares issued and outstanding do not included any unvested restricted common stock as of September 30, 2013.