Segments: (Segment reconciliations) (Details 3) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013		Sep. 30, 2014	Sep. 30, 2013
Pre-tax Income
Income from continuing operations before income taxes	$ 4,361	$ 4,972	[1]	$ 12,891	$ 13,142	[1]
Total reportable segments
Pre-tax Income
Income from continuing operations before income taxes	5,195	5,738	[2]	15,386	15,583	[2]
Pre-tax reconciliations items
Pre-tax Income
Amortization of acquired intangible assets	(201)	(201)	[2]	(596)	(562)	[2]
Acquisition-related charges	0	(13)	[2]	(10)	(29)	[2]
Non-operating retirement-related (costs)/income	(71)	(257)	[2]	(246)	(803)	[2]
Eliminations of internal transactions
Pre-tax Income
Income from continuing operations before income taxes	(402)	(280)	[2]	(1,433)	(998)	[2]
Unallocated corporate amounts
Pre-tax Income
Income from continuing operations before income taxes	$ (160)	$ (15)	[2]	$ (209)	$ (49)	[2]

[1] Reclassified to reflect discontinued operations presentation. See note 1 on page 9 for additional information.

[2] Reclassified to reflect discontinued operations presentation.