Comprehensive Income (Details 1) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2012	$ (22.3)
Other comprehensive income/(loss) before reclassifications	(32.6)
Amounts reclassified from AOCI	(39.0)
Net other comprehensive income/(loss)	(71.6)
Balance as of March 31, 2013	(93.9)
Gains / (Losses) on Cash Flow Hedges [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2012	1.1
Other comprehensive income/(loss) before reclassifications	(5.2)
Amounts reclassified from AOCI	2.1
Net other comprehensive income/(loss)	(3.1)
Balance as of March 31, 2013	(2.0)
Unrealized Gains / (Losses) on Available-for-Sale Securities [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2012	9.3
Other comprehensive income/(loss) before reclassifications	(6.2)
Amounts reclassified from AOCI	0
Net other comprehensive income/(loss)	(6.2)
Balance as of March 31, 2013	3.1
Defined Benefit Pension Plan Items [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2012	(147.5)
Other comprehensive income/(loss) before reclassifications	0.4
Amounts reclassified from AOCI	0
Net other comprehensive income/(loss)	0.4
Balance as of March 31, 2013	(147.1)
Foreign Currency Translation Adjustments [Member]
Changes in AOCI by component (net of tax) [Roll Forward]
Balance as of December 31, 2012	114.8
Other comprehensive income/(loss) before reclassifications	(21.6)
Amounts reclassified from AOCI	(41.1)
Net other comprehensive income/(loss)	(62.7)
Balance as of March 31, 2013	$ 52.1