Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2014
Income Taxes [Line Items]
U.S. federal statutory rate			35.00%
Effective income tax rate	0.50%	10.90%	13.30%	16.40%
Income before income taxes, domestic operations			$ 28.2	$ 38.8
Income before income taxes, foreign operations			41.9	$ 37.5
Liabilities for uncertain income tax positions	$ 25.1		25.1					$ 37.6
Cash paid for income taxes			26.9
Prepaid tax payments	$ 14.5		14.5					$ 5.8
California Franchise Tax Board [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination					2011	2010	2009
State and Local Jurisdiction [Member]
Income Taxes [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions			0.9
Internal Revenue Service (IRS) [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination					2011
Tax Adjustments, Settlements, and Unusual Provisions			1.8
Liability for uncertain tax positions			$ 9.3
Canada Revenue Agency [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination					2011	2010
New York City Department of Finance [Member]
Income Taxes [Line Items]
Income Tax Examination, Year under Examination					2011	2010	2009