Comprehensive Income (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2014	$ (153.5)
Other comprehensive income/(loss) before reclassifications	(28.7)
Amounts reclassified from AOCI	3.5
Net other comprehensive income/(loss)	(25.2)
Balance as of March 31, 2015	(178.7)
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	(1.1)
Amounts reclassified from AOCI	2.2
Net other comprehensive income/(loss)	1.1
Balance as of March 31, 2015	(3.5)
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	0
Amounts reclassified from AOCI	0
Net other comprehensive income/(loss)	0
Balance as of March 31, 2015	3.2
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	(0.3)
Amounts reclassified from AOCI	1.3
Net other comprehensive income/(loss)	1.0
Balance as of March 31, 2015	(148.4)
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	(27.3)
Amounts reclassified from AOCI	0
Net other comprehensive income/(loss)	(27.3)
Balance as of March 31, 2015	$ (30.0)