Condensed Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock [Member]	Common Stock [Member]	Share-Based Awards [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Stock Held in Treasury, at Cost [Member]
Beginning Balance at Dec. 31, 2014		$ 9,200	$ 9	$ 3,766	$ 50,049	$ 78,984	$ (743)	$ (58,468)
Issuance and amortization of share-based awards				2,308
Net earnings						6,083
Repurchased								(4,195)
Issued		2,000
Other comprehensive income/(loss)							25
Delivery of common stock underlying share-based awards				(1,742)	2,092
Dividends and dividend equivalents declared on common stock and share-based awards						(1,166)
Reissued								32
Cancellation of share-based awards in satisfaction of withholding tax requirements					(1,198)
Forfeiture of share-based awards				(72)
Dividends declared on preferred stock						(515)
Other								(9)
Preferred stock issuance costs, net					(7)
Exercise of share-based awards				(109)
Excess net tax benefit related to share-based awards					406
Cash settlement of share-based awards					(2)
Ending Balance at Dec. 31, 2015	$ 86,728	11,200	9	4,151	51,340	83,386	(718)	(62,640)
Ending Balance (Accounting Standards Update 2016-01 [Member]) at Dec. 31, 2015						83,081	(413)
Reclassification of cumulative debt valuation adjustment, net of tax, from retained earnings to accumulated other comprehensive loss | Accounting Standards Update 2016-01 [Member]						(305)	305
Issuance and amortization of share-based awards				1,981
Net earnings	5,051					5,051
Repurchased	(4,569)							(4,569)
Issued		1,325
Other comprehensive income/(loss)	(169)						(169)
Delivery of common stock underlying share-based awards				(2,065)	2,077
Dividends and dividend equivalents declared on common stock and share-based awards						(855)
Reissued								21
Redeemed		(1,322)
Cancellation of share-based awards in satisfaction of withholding tax requirements					(954)
Forfeiture of share-based awards				(80)
Dividends declared on preferred stock	(383)					(383)
Other								(7)
Preferred stock issuance costs, net					(10)
Exercise of share-based awards				(13)
Preferred stock redemption discount	266					266
Excess net tax benefit related to share-based awards					88
Ending Balance at Sep. 30, 2016	$ 87,110	$ 11,203	$ 9	$ 3,974	$ 52,541	$ 87,160	$ (582)	$ (67,195)