Condensed Consolidated Statement of Comprehensive Income (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Unrealized gains (losses) on marketable securities, deferred taxes	$ 0	$ (11)	$ (19)	$ (82)
Deferred gains (losses) on cash flow hedges, deferred taxes	2	(26)	1	(6)
Realized (gains) losses on marketable securities, deferred taxes	0	165	58	177
Realized (gains) losses on cash flow hedges, deferred taxes	(22)	22	(10)	(6)
Employee benefit obligations, deferred taxes	0	(34)	0	(36)
Currency translation adjustments, deferred taxes	$ 10	$ (5)	$ 3	$ 9