CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (PARENTHETICAL) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Comprehensive Income, Finalization of Pension [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax		$ (2)
Pension Plans, Defined Benefit [Member]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax		1
Derivative [Member]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax		(1)
Available-for-sale Securities [Member]
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax		$ 0