Income Taxes (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
United States
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 10
Net operating loss, expiration date	December 31, 2023
Tax credits	31
Tax credit, expiration date	Dec. 31, 2020
State
Operating Loss Carryforwards [Line Items]
Net operating loss	48
Net operating loss, expiration date	December 31, 2014
Foreign
Operating Loss Carryforwards [Line Items]
Net operating loss	$ 1,214
Net operating loss, expiration date	December 31, 2014