Stockholders' (Deficit) Equity (Narrative) (Details) (Two Thousand Fourteen Share Buyback Program [Member], USD $)	1 Months Ended
	Jan. 30, 2015	Jul. 23, 2014
Two Thousand Fourteen Share Buyback Program [Member]
Treasury Stock Repurchase Programs [Line Items]
Additional share repurchase amount authorized	$ 452,900,000	$ 490,600,000
Common stock authorized to repurchase	1,000,000,000	1,000,000,000
Remaining common stock available for repurchase	$ 547,100,000	$ 509,400,000