Accumulated Other Comprehensive Income (Loss) (Schedule Of Changes In Accumulated Other Comprehensive Income (Loss) By Component) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Foreign Currency Translation Adjustment, Before Taxes [Roll Forward]
Foreign currency translation adjustments, beginning balance, before tax	$ (89.9)	$ (34.8)
Change in foreign currency translation, before tax	19.5	(40.8)
Foreign currency translation adjustments, ending balance, before tax	(70.4)	(75.6)
Foreign Currency Translation Adjustment, Tax [Roll Forward]
Foreign currency translation adjustment, beginning balance, tax	0.0	0.0
Change in foreign currency translation, tax	0.0	0.0
Foreign currency translation adjustment, ending balance, tax	0.0	0.0
Foreign Currency Translation Adjustment, Net of Tax [Roll Forward]
Foreign currency translation adjustments, beginning balance, net of tax	(89.9)	(34.8)
Change in foreign currency translation, net of tax	19.5	(40.8)
Foreign currency translation adjustments, ending balance, net of tax	(70.4)	(75.6)
Available-for-sale Securities Adjustment, Before Taxes [Roll Forward]
Unrealized gains (losses) on available-for-sale investment securities, beginning balance, before tax	(6.8)	(2.4)
Unrealized (losses) gains arising on available-for-sale investment securities during the period, before tax	8.3	4.2
Reclassification of (gains) to other, net on available-for-sale investment securities, before tax	0.0	(0.3)
Net change on available-for-sale investment securities, before tax	8.3	3.9
Unrealized gains (losses) on available-for-sale investment securities, ending balance, before tax	1.5	1.5
Available-for-sale Securities Adjustment, Tax [Roll Forward]
Unrealized gains (losses) on available-for-sale investment securities, beginning balance, tax	2.2	0.8
Unrealized (losses) gains arising on available-for-sale investment securities during the period, tax	(2.9)	(1.7)
Reclassification of (gains) to other, net on available-for-sale investment securities, tax	0.0	0.2
Net change on available-for-sale investment securities, tax	(2.9)	(1.5)
Unrealized gains (losses) on available-for-sale investment securities, ending balance, tax	(0.7)	(0.7)
Available-for-sale Securities Adjustment, Net of Tax [Roll Forward]
Unrealized gains (losses) on available-for-sale investment securities, beginning balance, net of tax	(4.6)	(1.6)
Unrealized (losses) gains arising on available-for-sale investment securities during the period, net of tax	5.4	2.5
Reclassification of (gains) to other, net on available-for-sale investment securities, net of tax	0.0	(0.1)
Net change on available-for-sale investment securities, net of tax	5.4	2.4
Unrealized gains (losses) on available-for-sale investment securities, ending balance, net of tax	0.8	0.8
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Before Taxes [Roll Forward]
Unrealized (losses) on cash flow hedges, beginning balance, before tax	(14.4)	(102.6)
Unrealized (losses) arising on cash flow hedges during the period, before tax	22.0	34.7
Net change on cash flow hedges, before tax	24.5	48.4
Unrealized (losses) on cash flow hedges, ending balance, before tax	10.1	(54.2)
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax [Roll Forward]
Unrealized (losses) on cash flow hedges, beginning balance, tax	2.7	15.9
Unrealized (losses) arising on cash flow hedges during the period, tax	(4.2)	(3.7)
Net change on cash flow hedges, tax	(4.8)	(6.2)
Unrealized (losses) on cash flow hedges, ending balance, tax	(2.1)	9.7
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax [Roll Forward]
Unrealized (losses) on cash flow hedges, beginning balance, net of tax	(11.7)	(86.7)
Unrealized (losses) arising on cash flow hedges during the period, net of tax	17.8	31.0
Net change on cash flow hedges, net of tax	19.7	42.2
Unrealized (losses) on cash flow hedges, ending balance, net of tax	8.0	(44.5)
Accumulated Other Comprehensive Income (Loss), Before Taxes [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance, before tax	(111.1)	(139.8)
Other comprehensive income loss, before tax	52.3	11.5
Accumulated other comprehensive income (loss), ending balance, before tax	(58.8)	(128.3)
Accumulated Other Comprehensive Income (Loss), Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance, tax	4.9	16.7
Other comprehensive income loss, tax	(7.7)	(7.7)
Accumulated other comprehensive income (loss), ending balance, tax	(2.8)	9.0
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss), beginning balance, net of tax	(106.2)	(123.1)
Other comprehensive income (loss)	44.6	3.8
Accumulated other comprehensive income (loss), ending balance, net of tax	(61.6)	(119.3)
Cost Of Revenues [Member]
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Before Taxes [Roll Forward]
Reclassifications of losses on cash flow hedges, before tax	2.1	11.2
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax [Roll Forward]
Reclassification of losses on cash flow hedges, tax	(0.5)	(2.0)
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax [Roll Forward]
Reclassification of losses on cash flow hedges, net of tax	1.6	9.2
Selling, General and Administrative Expenses [Member]
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Before Taxes [Roll Forward]
Reclassifications of losses on cash flow hedges, before tax	0.4	2.5
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Tax [Roll Forward]
Reclassification of losses on cash flow hedges, tax	(0.1)	(0.5)
Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax [Roll Forward]
Reclassification of losses on cash flow hedges, net of tax	$ 0.3	$ 2.0