Debt (Notes)	3 Months Ended
Mar. 31, 2017
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	Debt In March 2017, we used cash on hand to redeem an aggregate principal amount of $1.4 billion of senior notes, which consisted of $400 million of 5.90% senior notes due September 2018 and $1.0 billion of 6.15% senior notes due September 2019. In conjunction with this redemption, we terminated a series of interest rate swaps associated with these senior notes. As a result, we recorded $104 million in costs related to the early extinguishment of debt, which included the redemption premium and a write-off of the remaining original debt issuance costs and debt discount, partially offset by a gain from the termination of the related interest rate swap agreements. These debt extinguishment costs are included in interest expense on our condensed consolidated statement of operations for the three months ended March 31, 2017.

Debt (Notes)

3 Months Ended

Mar. 31, 2017

Debt

In March 2017, we used cash on hand to redeem an aggregate principal amount of $1.4 billion of senior notes, which consisted of $400 million of 5.90% senior notes due September 2018 and $1.0 billion of 6.15% senior notes due September 2019. In conjunction with this redemption, we terminated a series of interest rate swaps associated with these senior notes. As a result, we recorded $104 million in costs related to the early extinguishment of debt, which included the redemption premium and a write-off of the remaining original debt issuance costs and debt discount, partially offset by a gain from the termination of the related interest rate swap agreements. These debt extinguishment costs are included in interest expense on our condensed consolidated statement of operations for the three months ended March 31, 2017.