Financing Agreements (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Long-Term Debt [Table Text Block]

Long-term debt at December 31 —

		2015					2014
	Interest Rate	Principal		Unamortized Debt Issue Costs			Principal		Unamortized Debt Issue Costs
Senior Notes due February 15, 2019	6.500%	$	—	$	—		$	55	$	(1	)
Senior Notes due February 15, 2021	6.750%	350		(4		)	350		(5		)
Senior Notes due September 15, 2021	5.375%	450		(6		)	450		(7		)
Senior Notes due September 15, 2023	6.000%	300		(5		)	300		(5		)
Senior Notes due December 15, 2024	5.500%	425		(6		)	425		(7		)
Other indebtedness		66					79
Total		$	1,591	$	(21	)	$	1,659	$	(25	)

Scheduled Principal Payments on Long-Term Debt [Table Text Block]

Scheduled principal payments on long-term debt at December 31, 2015 —

	2016		2017		2018		2019		2020		Thereafter		Total
Debt maturities	$	17	$	18	$	20	$	3	$	—	$	1,525	$	1,583

Redemption Prices [Table Text Block]

We may redeem some or all of the senior notes at the following redemption prices (expressed as percentages of principal amount), plus accrued and unpaid interest to the redemption date, if redeemed during the 12-month period commencing on the anniversary date of the senior notes in the years set forth below:

	Redemption Price
	February		September		September		December
Year	2021 Notes		2021 Notes		2023 Notes		2024 Notes
2016	103.375	%	104.031	%
2017	102.250	%	102.688	%
2018	101.125	%	101.344	%	103.000	%
2019	100.000	%	100.000	%	102.000	%	102.750	%
2020	100.000	%	100.000	%	101.000	%	101.833	%
2021					100.000	%	100.917	%
2022					100.000	%	100.000	%
2023							100.000	%

Margin Based on Remaining Borrowing Availability [Table Text Block]

Advances under the Amended Revolving Facility bear interest at a floating rate based on, at our option, the base rate or LIBOR (each as described in the revolving credit agreement) plus a margin based on the undrawn amounts available under the agreement as set forth below:

	Margin
Remaining Borrowing Availability	Base Rate		LIBOR Rate
Greater than $350	0.50	%	1.50	%
Greater than $150 but less than or equal to $350	0.75	%	1.75	%
$150 or less	1.00	%	2.00	%