10. Fair Value of Financial Instruments (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] As restated and amended [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 1 [member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 1 [member] As restated and amended [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 2 [Member]	Dec. 31, 2011 Fair Value, Measurements, Recurring [Member] Level 2 [Member] As restated and amended [Member]	Dec. 31, 2012 Fair Value, Measurements, Recurring [Member] Level 3 [Member]	Dec. 31, 2011 Level 3 [Member] As restated and amended [Member] Fair Value, Measurements, Recurring [Member]
Corporates
Consumer	$ 742.4	$ 451.2			$ 352.9	$ 205.3	$ 389.5	$ 245.9
Energy	98.4	43.0			79.6	29.8	18.8	13.2
Financial services	527.7	365.0			361.9	247.5	165.8	117.5
Technical/communications	53.0	36.9			45.4	33.4	7.6	3.5
Transportation	39.1	31.6			9.3	6.1	29.8	25.5
Utilities	251.1	193.1			116.9	111.1	134.2	82.0
Other	185.8	83.9			130.0	57.7	55.8	26.2
Total corporates	$ 1,897.5	$ 1,204.7			$ 1,096.0	$ 690.9	$ 801.5	$ 513.8