Financing Agreements (Tables)

6 Months Ended

Jun. 30, 2015

Debt Disclosure [Abstract]

Long-term Debt

Long-term debt at —

	Interest Rate	June 30,   2015		December 31,   2014
Senior Notes due February 15, 2019	6.500%	$	—	$	55
Senior Notes due February 15, 2021	6.750%	350		350
Senior Notes due September 15, 2021	5.375%	450		450
Senior Notes due September 15, 2023	6.000%	300		300
Senior Notes due December 15, 2024	5.500%	425		425
Other indebtedness*		80		79
Total		1,605		1,659
Less: current maturities		35		46
Total long-term debt		$	1,570	$	1,613

* Includes fair value adjustments related to an interest rate swap. See Note 11 for additional information.

Margin Based on Remaining Borrowing Availability

Advances under our $500 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:

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	%