Investments (Tables)

3 Months Ended

Mar. 31, 2015

Investments [Abstract]

Equity Method Investments [Table Text Block]

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

		Approximate Ownership %		Carrying Value
	Accounting Method	March 31, 2015	December 31, 2014	March 31, 2015		December 31, 2014
				($ in millions)
FTS International, Inc.	Equity	30%	30%	$	118	$	116
Sundrop Fuels, Inc.	Equity	56%	56%	130		130
Other	—	—%	—%	20		19
Total investments				$	268	$	265