Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	$ (29,315,000)		$ (29,315,000)		$ (55,305,000)
Other comprehensive income loss before reclassifications			22,500,000
Amounts reclassified from accumulated other comprehensive income loss			3,500,000
Net current period other comprehensive income loss	25,820,000	(560,000)	25,990,000	(24,516,000)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	15,400,000		15,400,000		4,200,000
Other comprehensive income loss before reclassifications			14,100,000
Amounts reclassified from accumulated other comprehensive income loss			(2,900,000)
Net current period other comprehensive income loss			11,200,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	(16,300,000)		(16,300,000)		(10,700,000)
Other comprehensive income loss before reclassifications			(12,000,000)
Amounts reclassified from accumulated other comprehensive income loss			6,400,000
Net current period other comprehensive income loss			(5,600,000)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	(18,500,000)		(18,500,000)		(21,700,000)
Other comprehensive income loss before reclassifications			3,200,000
Amounts reclassified from accumulated other comprehensive income loss			0
Net current period other comprehensive income loss			3,200,000
Accumulated Translation Adjustment [Member]
Accumulated other comprehensive income [Line Items]
Accumulated other comprehensive income (loss), net of tax	(9,900,000)		(9,900,000)		(27,100,000)
Other comprehensive income loss before reclassifications			17,200,000
Amounts reclassified from accumulated other comprehensive income loss			0
Net current period other comprehensive income loss			$ 17,200,000