Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2011

Comprehensive Income [Abstract]

Accumulated Other Comprehensive Income Loss Net Of Tax

The components of accumulated other comprehensive loss, net of tax, at December 31 were as follows:

($ in millions)	2011			2010
Foreign currency translation	$	10.2		$	22.0
Unrealized gains on securities of affiliates		0.4			0.1
Unrealized losses on derivatives		(5.4	)		(3.7	)
Defined benefit pension and other postretirement plans		(76.7	)		(49.7	)
	$	(71.5	)	$	(31.3	)