Employee Benefits (Net Periodic Cost) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net periodic benefit cost:
Service cost	$ 4,300,000	$ 3,900,000	$ 3,600,000
Interest cost	56,200,000	59,300,000	61,200,000
Expected return on plan assets	(55,600,000)	(51,100,000)	(43,000,000)
Amortization of prior net loss	14,800,000	9,000,000	9,600,000
Net periodic pension cost	19,700,000	21,100,000	31,400,000
Other changes in plan assets and benefit obligations recognized in other comprehensive loss:
Net actuarial loss (gain) and other adjustments	(107,700,000)	170,400,000	3,600,000
Less amortization of prior losses	(14,800,000)	(9,000,000)	(9,600,000)
Total recognized in other comprehensive loss (income)	(122,500,000)	161,400,000	(6,000,000)
Total recognized in net periodic benefit cost and other comprehensive (income) loss	(102,800,000)	182,500,000	25,400,000
Income tax provision (benefit) related to amounts in other comprehensive income	$ 42,700,000	$ (1,300,000)	$ 0