Business Segment Information (Summary of Operations by Reportable Segments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2008
Net revenues	$ 2,068.1	$ 2,118.3	$ 2,069.6
Depreciation and amortization	48.8	44.2	45.7
Capital expenditures	35.2	51.5	20.2
Segment Assets	2,285.3	2,015.9	2,000.6
Goodwill, Impairment Loss	0.0	0.0	137.6
Interest Expense	52.9	53.8	10.2
Disposal Group, Not Discontinued Operation, Loss on Disposal	104.2	0.0	0.0
Other Nonoperating Income (Expense)	7.8	(4.6)	(7.2)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	209.3	267.9	223.4
Americas [Member]
Net revenues	1,558.4	1,560.0	1,514.7
Segment Operating Income	$ 418.0	$ 387.3	$ 392.1
Segment Operating Income As a Percentage Of Revenues	26.80%	24.80%	25.90%
Depreciation and amortization	$ 26.4	$ 24.8	$ 26.5
Capital expenditures	18.9	23.6	10.5
Segment Assets	878.4	990.7	890.4
EMEIA [Member]
Net revenues	386.3	393.4	401.4
Segment Operating Income	$ 8.6	$ 4.9	$ (0.3)
Segment Operating Income As a Percentage Of Revenues	2.20%	1.20%	(0.10%)
Depreciation and amortization	$ 17.2	$ 16.4	$ 18.2
Capital expenditures	5.6	4.9	5.6
Segment Assets	899.4	457.7	525.6
Goodwill, Impairment Loss			137.6	$ 341.0
Asia Pacific [Member]
Net revenues	123.4	164.9	153.5
Segment Operating Income	$ (3.4)	$ 2.3	$ 25.4
Segment Operating Income As a Percentage Of Revenues	(2.80%)	1.40%	16.50%
Depreciation and amortization	$ 2.1	$ 1.1	$ 0.9
Capital expenditures	2.0	1.5	0.8
Segment Assets	237.1	442.2	403.2
Goodwill, Impairment Loss				$ 6.9
Segment Reconciling Items [Member]
Depreciation and amortization	3.1	1.9	0.1
Capital expenditures	8.7	21.5	3.3
Segment Assets	270.4	125.3	181.4
Operating Expenses	64.6	68.2	38.8
Operating Segments [Member]
Segment Operating Income	423.2	394.5	417.2
Depreciation and amortization	45.7	42.3	45.6
Capital expenditures	26.5	30.0	16.9
Segment Assets	$ 2,014.9	$ 1,890.6	$ 1,819.2