Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009
North America [Member]
Segment Reporting Information [Line Items]
Net income effected by segment revisions	$ 10.0	$ 8.8
Europe [Member]
Segment Reporting Information [Line Items]
Net income effected by segment revisions	2.2	2.1
International [Member]
Segment Reporting Information [Line Items]
Net income effected by segment revisions	$ 1.9	$ 1.6