CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Tax effect of foreign currency translation adjustments arising during the period	$ (5)	$ 1
Tax effect of available-for-sale securities arising during the period	(6)	(6)
Tax effect of qualifying derivatives arising during the period	4	25
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period	0	0
Tax effect of available-for-sale securities reclassified from accumulated other comprehensive income (loss)	1	1
Tax effect of qualifying derivatives reclassified from accumulated other comprehensive income (loss)	4	(4)
Tax effect of equity investees' other comprehensive income (loss) reclassified from accumulated other comprehensive income (loss)	(1)	0
Tax effect of prior service costs reclassified from accumulated other comprehensive income (loss)	0	(1)
Tax effect of net actuarial loss reclassified from accumulated other comprehensive income (loss)	$ (13)	$ (9)