Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Tax Contingency [Line Items]
Income (loss) from continuing operations before income taxes for United States operations	$ 376.3	$ 225.9	$ 103.4
Income (loss) from continuing operations before income taxes for foreign operations	9.6	13.1	3.3
Tax benefit from final audit settlement with IRS	3.5
Tax benefit recognized on release of net state tax reserves	4.4
Unrecognized tax benefits including interest and penalties that would affect the Company's effective tax rate if recognized	13.2	19.4
Total accrued interest and penalties	10.3	13.3
Increase (decrease) in income tax expense related to interest and penalties on unrecognized tax benefits	(3.0)	2.1
Lapse in Statute of Limitations
Income Tax Contingency [Line Items]
Reasonably possible change to unrecognized tax benefits within twelve months	1.0
Anticipated Settlement With Taxing Authorities
Income Tax Contingency [Line Items]
Reasonably possible change to unrecognized tax benefits within twelve months	28.7
Swiss subsidiary
Income Tax Contingency [Line Items]
Number of subsidiaries	2
General period of statute of limitations in Switzerland	5 years
Extended period of statute of limitations in Switzerland	15 years
U.S. Federal
Income Tax Contingency [Line Items]
Net operating loss carryforwards	103.3
Net operating loss carryforwards, expiration dates	between 2028 and 2031
U.S. Federal | TRIP Holdings
Income Tax Contingency [Line Items]
Tax loss carryforwards	439.7
Net operating loss carryforwards, expiration dates	between 2027 and 2032
State and local
Income Tax Contingency [Line Items]
Net operating loss carryforwards	5.4
Foreign
Income Tax Contingency [Line Items]
Tax loss carryforwards	$ 42.2
Tax loss carryforwards, expiration dates	between 2014 and 2022