Income Taxes (Effective Income Tax Reconciliation) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S. federal corporate tax rate	35.00%	35.00%	35.00%
Tax on international operations less than U.S. tax rate	(6.80%)	(5.30%)	(5.90%)
Non-benefited losses	0.00%	0.00%	0.60%
Reversal of prior valuation allowance	(0.50%)	(1.00%)	0.00%
Reversal of reserves for unrecognized tax benefits	(0.50%)	(0.80%)	(0.20%)
U.S. tax on international earnings, net of foreign tax credits	(0.10%)	0.10%	(1.20%)
State income taxes, net of federal tax effect	1.50%	0.10%	(1.00%)
U.S. research and development credits	(0.90%)	(1.80%)	0.00%
Other business credits and Section 199 Deduction	(0.70%)	(0.50%)	(1.00%)
Non-deductible debt premium	0.00%	0.00%	2.00%
Other	1.00%	1.60%	1.90%
Effective tax rate	28.00%	27.40%	30.20%
Discrete tax charge, change in enacted tax rate		$ 1.3	$ 0.8
Discrete tax benefit, R&D credit		1.3
Discrete tax charge, foreign tax credit			1.0
Discrete tax charge, other adj	1.0	3.5	0.3
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount	$ 0.8