Financing Agreements - Redemption Price Expressed as Percentage of Principal Amount (Details) - Senior Notes Due June 2026 [Member]	6 Months Ended
	Jun. 30, 2016
Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Debt redemption price	103.25%
Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Debt redemption price	102.167%
Debt Instrument, Redemption, Period Five [Member]
Debt Instrument [Line Items]
Debt redemption price	101.083%
Debt Instrument Redemption Period Six [Member]
Debt Instrument [Line Items]
Debt redemption price	100.00%
Debt Instrument Redemption Period Seven [Member]
Debt Instrument [Line Items]
Debt redemption price	100.00%