Comprehensive Income (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Changes in AOCI by component (net of tax) [Roll Forward]
Beginning balance	$ (61.1)	$ (22.3)
Other comprehensive income/(loss) before reclassifications	(100.7)	(6.5)
Amounts reclassified from AOCI	8.3	(32.3)
Net other comprehensive (loss) income	(92.4)	(38.8)
Ending balance	(153.5)	(61.1)
Gains / (Losses) on Cash Flow Hedges [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Beginning balance	(0.6)	1.1
Other comprehensive income/(loss) before reclassifications	(7.8)	(4.4)
Amounts reclassified from AOCI	3.8	2.7
Net other comprehensive (loss) income	(4.0)	(1.7)
Ending balance	(4.6)	(0.6)
Unrealized Gains / (Losses) on Available-for-Sale Securities [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Beginning balance	2.5	9.3
Other comprehensive income/(loss) before reclassifications	0.7	(6.8)
Amounts reclassified from AOCI	0	0
Net other comprehensive (loss) income	0.7	(6.8)
Ending balance	3.2	2.5
Defined Benefit Pension Plan Items [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Beginning balance	(106.0)	(147.5)
Other comprehensive income/(loss) before reclassifications	(47.9)	35.4
Amounts reclassified from AOCI	4.5	6.1
Net other comprehensive (loss) income	(43.4)	41.5
Ending balance	(149.4)	(106.0)
Foreign Currency Translation Adjustments [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Beginning balance	43.0	114.8
Other comprehensive income/(loss) before reclassifications	(45.7)	(30.7)
Amounts reclassified from AOCI	0	(41.1)
Net other comprehensive (loss) income	(45.7)	(71.8)
Ending balance	$ (2.7)	$ 43.0