Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
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	(2.90%)	(5.10%)	(6.80%)
Reversal of prior valuation allowance	(0.30%)	0.00%	(0.50%)
Reversal of reserves for unrecognized tax benefits	(0.60%)	(1.60%)	(0.50%)
U.S. tax on international earnings, net of foreign tax credits	(1.30%)	(4.60%)	(0.10%)
State income taxes, net of federal tax effect	0.80%	0.30%	1.50%
U.S. research and development credits	(0.80%)	(1.30%)	(0.90%)
Other business credits and Section 199 Deduction	(1.10%)	(1.30%)	(0.70%)
Other	(0.10%)	1.20%	1.00%
Effective tax rate	28.70%	22.60%	28.00%
Income tax benefit, restructuring charges	$ 9.0
Discrete tax charge, pension curtailment	0.8
Net Gain Due to Curtailments	2.1	$ 0.0	$ 0.0
Income tax benefit, executive retirement & related costs		4.0
Income tax benefit, pension settlement		18.4
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount	$ 1.0	$ 0.8
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount			1.0
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount			$ 0.8