Debt (Details 2) (USD $) Share data in Millions, unless otherwise specified					6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013	Mar. 23, 2014 Argyros Group	Jun. 30, 2014 Accounts receivable securitization program	Jun. 30, 2013 Accounts receivable securitization program	Dec. 31, 2013 Accounts receivable securitization program	Jun. 30, 2014 Term loan credit facility	May 31, 2014 Term loan credit facility	Dec. 31, 2013 Term loan credit facility	Jun. 30, 2014 Amended Line of Credit Facility	Jun. 30, 2014 Senior notes	Dec. 31, 2013 Senior notes
Entity's debt and other obligations
Maximum borrowing capacity					$ 150,000,000						$ 630,000,000
Amount outstanding	671,700,000	683,000,000			150,000,000		150,000,000	0	125,000,000	125,000,000		370,000,000	370,000,000
Proceeds from the accounts receivable securitization program					505,100,000	482,200,000
Payments in respect of accounts receivable securitization program					$ 505,100,000	$ 467,200,000
Number of common shares held	39.7		43.3	9.2
Ownership percentage				22.00%