Other Items - Accumulated other comprehensive loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended																3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Foreign Currency Translation [Member]		Mar. 31, 2013 Foreign Currency Translation [Member]		Mar. 31, 2014 Interest Rate Swap [Member]		Mar. 31, 2013 Interest Rate Swap [Member]		Mar. 31, 2014 Interest Rate Swap [Member] Reclassification out of Accumulated Other Comprehensive Loss [Member]		Mar. 31, 2013 Interest Rate Swap [Member] Reclassification out of Accumulated Other Comprehensive Loss [Member]		Dec. 31, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2012 Accumulated Defined Benefit Plans Adjustment [Member]	Mar. 31, 2014 Accumulated Foreign Exchange Forward Contract Adjustment [Member]	Mar. 31, 2013 Accumulated Foreign Exchange Forward Contract Adjustment [Member]	Mar. 31, 2014 Accumulated Foreign Exchange Forward Contract Adjustment [Member] Reclassification out of Accumulated Other Comprehensive Loss [Member]	Mar. 31, 2013 Accumulated Foreign Exchange Forward Contract Adjustment [Member] Reclassification out of Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period			$ (15.6)		$ (4.9)		$ (1.4)		$ (2.7)						$ 3.2	$ 0	$ 0	$ 0
Other comprehensive (loss) income [Abstract]
Net change from period revaluations							0.7		1.4								1.7	0
Tax (expense) benefit	(11.5)	(2.6)					(0.3)	[1]	(0.5)	[1]	0.2	[1]	0.3	[1]			(0.4)	0	0.2	0
Total other comprehensive income (loss) before reclassifications, net of tax							0.4		0.9								1.3	0
Net amount reclassified to earnings											(0.5)	[2]	(0.8)	[2]					(0.6)
Total amount reclassified from accumulated other comprehensive income (loss), net of tax											(0.3)		(0.5)						(0.4)	0
Total other comprehensive income (loss)	1.8	(10.7)	0.8	[3]	(11.1)	[3]	0.1		0.4								0.9	0
Balance at end of period	$ 3.2	$ 0	$ (14.8)		$ (16.0)		$ (1.3)		$ (2.3)						$ 3.2	$ 0	$ 0.9	$ 0

[1] These amounts were included in the income tax provision on the accompanying Condensed Consolidated Statements of Income.

[2] This amount was included in interest expense, net on the accompanying Condensed Consolidated Statements of Income.

[3] In 2014 and 2013, there were no tax impacts related to rate changes and no amounts were reclassified to earnings.