Debt (Tables)

12 Months Ended

Dec. 31, 2011

Debt Disclosure [Abstract]

Schedule of Debt [Table Text Block]

Long-term and short-term debt consists of the following:

	December 31
	2011		2010
	(in millions of dollars)
Senior Secured Notes, variable due 2037, callable at or above par	$	560.0	$	634.4
Senior Secured Notes, variable due 2036, callable at or above par	72.5		82.5
Notes @ 7.375% due 2032, callable at or above par	39.5		39.5
Notes @ 6.75% due 2028, callable at or above par	165.8		165.8
Notes @ 7.25% due 2028, callable at or above par	200.0		200.0
Notes @ 5.625% due 2020, callable at or above par	399.6		399.5
Notes @ 7.125% due 2016, callable at or above par	358.8		335.6
Notes @ 6.85% due 2015, callable at or above par	296.7		296.7
Notes @ 7.0% due 2018, non-callable	200.0		200.0
Medium-term Notes @ 7.0% to 7.2% due 2023 to 2028, non-callable	50.8		50.8
Junior Subordinated Debt Securities @ 7.405% due 2038	226.5		226.5
Long-term Debt	2,570.2		2,631.3
Securities Lending Agreements - See Note 3	312.3		—
Notes @ 7.625% due 2011	—		225.1
Short-term Debt	312.3		225.1
Total	$	2,882.5	$	2,856.4