Comprehensive Income (Details 1) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2014	$ (153.5)
Other comprehensive income (loss) before reclassifications	(66.4)
Amounts reclassified from AOCL	10.1
Net other comprehensive income (loss)	(56.3)
Balance as of September 30, 2015	(209.8)
Gains / (Losses) on Cash Flow Hedges [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2014	(4.6)
Other comprehensive income (loss) before reclassifications	(9.4)
Amounts reclassified from AOCL	6.2
Net other comprehensive income (loss)	(3.2)
Balance as of September 30, 2015	(7.8)
Unrealized Gains on Available-for-Sale Securities [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2014	3.2
Other comprehensive income (loss) before reclassifications	1.8
Amounts reclassified from AOCL	0.0
Net other comprehensive income (loss)	1.8
Balance as of September 30, 2015	5.0
Defined Benefit Pension Plan Items [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2014	(149.4)
Other comprehensive income (loss) before reclassifications	(2.7)
Amounts reclassified from AOCL	3.9
Net other comprehensive income (loss)	1.2
Balance as of September 30, 2015	(148.2)
Foreign Currency Translation Adjustments [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2014	(2.7)
Other comprehensive income (loss) before reclassifications	(56.1)
Amounts reclassified from AOCL	0.0
Net other comprehensive income (loss)	(56.1)
Balance as of September 30, 2015	$ (58.8)