Description of the Business and Basis of Presentation Basis of Presentation (Details) (Total costs and expenses, Increase in prior year bonus expense, USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Total costs and expenses | Increase in prior year bonus expense
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying misstatement in current year financial statements, amount	$ 29