Comprehensive Income (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2013	$ (61.1)
Other comprehensive income/(loss) before reclassifications	(1.5)
Amounts reclassified from AOCI	1.5
Net other comprehensive income/(loss)	0
Balance as of March 31, 2014	(61.1)
Gains / (Losses) on Cash Flow Hedges [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2013	(0.6)
Other comprehensive income/(loss) before reclassifications	(4.4)
Amounts reclassified from AOCI	0.7
Net other comprehensive income/(loss)	(3.7)
Balance as of March 31, 2014	(4.3)
Unrealized Gains / (Losses) on Available-for-Sale Securities [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2013	2.5
Other comprehensive income/(loss) before reclassifications	0.5
Amounts reclassified from AOCI	0
Net other comprehensive income/(loss)	0.5
Balance as of March 31, 2014	3.0
Defined Benefit Pension Plan Items [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2013	(106.0)
Other comprehensive income/(loss) before reclassifications	(0.2)
Amounts reclassified from AOCI	0.8
Net other comprehensive income/(loss)	0.6
Balance as of March 31, 2014	(105.4)
Foreign Currency Translation Adjustments [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2013	43.0
Other comprehensive income/(loss) before reclassifications	2.6
Amounts reclassified from AOCI	0
Net other comprehensive income/(loss)	2.6
Balance as of March 31, 2014	$ 45.6