Pension and Other Postretirement Benefits-Projected Benefit Obligation (Details) (Other Postretirement Benefit Plan, Defined Benefit [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Accumulated Benefit Obligation, Continuing and Discontinued Operations, beginning of year	$ 197	$ 195
Service Cost, Continuing and Discontinued Operations	1	1
Interest Cost, Continuing and Discontinued Operations	6	7
Actuarial Losses, Continuing and Discontinued Operations	(16)	26
Benefits Paid, Continuing and Discontinued Operations	(14)	(21)
Curtailments, Continuing and Discontinued Operations	0	(11)
Accumulated Benefit Obligation, Continuing and Discontinued Operations, end of year	$ 174	$ 197