Other Non-Operating Expense (Tables)

6 Months Ended

Jun. 30, 2014

Other Income and Expenses [Abstract]

Schedule of Other Nonoperating Expense

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2014		2013		2014		2013
	(in millions)
Silver Ridge Power	$	44	$	—	$	44	$	—
Total other non-operating expense	$	44	$	—	$	44	$	—