Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 0	$ 0
Accumulated Amortization	$ 74	$ 73
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000	1,000
Common stock, shares issued	935.42	1,000