Supplemental Guarantor Condensed Consolidating Financial Statements Guarantor (Narrative) (Details)	Dec. 31, 2015
Debt Instrument [Line Items]
Ownership in Subsidiary, Percentage	100.00%
7.75% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.75%
6.625% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.625%
6.25% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.25%
5.125% Notes [Member] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	5.125%