Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Valuation allowances	$ 60.5	$ 69.1
Estimated future taxable income to realize foreign tax credits	$ 63.1
Estimated future taxable income to realize foreign tax credits, expiration year	2022
Unremitted earnings not taxed	$ 275.9
Unrecognized tax benefits	86.9	150.6	$ 142.6	$ 145.2
UTB if recognized, would impact the reported effective tax rate	63.1
UTB if recognized, would impact the reported effective tax rate, net of federal benefit	61.6
Interest and penalty exposure reported as accrued income tax	$ 4.0
Minimum [Member]
Income Taxes [Line Items]
Number of open tax years subject to audit	3 years
Maximum [Member]
Income Taxes [Line Items]
Number of open tax years subject to audit	6 years
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards	$ 760.6	863.1
Valuation allowances	16.5
Valuation allowance, increase (decrease)	2.7
Estimated future taxable income to utilize deferred tax assets	772.7
UTB decrease due to uncertain tax positions	$ 0.1
State [Member] | Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2017
State [Member] | Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2036
Foreign [Member]
Income Taxes [Line Items]
Operating loss carryforwards	$ 149.0	202.9
Operating loss carryforwards, finite	60.6
Operating loss carryforwards, indefinite	88.4
Valuation allowances	43.2
Valuation allowance, increase (decrease)	$ (12.1)
Foreign [Member] | Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2017
Foreign [Member] | Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2034
Federal [Member]
Income Taxes [Line Items]
Tax credit carryforward gross	$ 22.1	27.1
Tax credit carryforward netted with unrecognized tax benefits	19.3	$ 12.3
Valuation allowances	0.8
Estimated future taxable income to realize foreign tax credits	52.9
UTB increase due to uncertain tax positions	$ 3.7
Federal [Member] | Minimum [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration year	2017
Federal [Member] | Maximum [Member]
Income Taxes [Line Items]
Tax credit carryforward, expiration year	2022