Investments (Tables)

6 Months Ended

Jun. 30, 2015

Investments [Abstract]

Equity Method Investments

A summary of our investments, including our approximate ownership percentage and carrying value as of June 30, 2015 and December 31, 2014, is presented below.

		Approximate Ownership %		Carrying Value
	Accounting Method	June 30, 2015	December 31, 2014	June 30, 2015		December 31, 2014
				($ in millions)
FTS International, Inc.	Equity	30%	30%	$	106	$	116
Sundrop Fuels, Inc.	Equity	56%	56%	131		130
Other	—	—%	—%	18		19
Total investments				$	255	$	265