CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Millions	Total	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Reserve for ESOP Debt Retirement [Member]	AOCI Attributable to Parent [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 2.1516
Common Stock, Shares, Outstanding, Beginning Balance at Jun. 30, 2018		2,498,093
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Jun. 30, 2018	$ 52,883	$ 4,009	$ 967	$ 63,846	$ (1,204)	$ (14,749)	$ (99,217)	$ 98,641	$ 590
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent								9,138
Net Income (Loss) Attributable to Noncontrolling Interest	65								65
Cumulative Effect on Retained Earnings, Net of Tax	(553)					(326)		(200)	(27)
Net Earnings	9,203
Other Comprehensive Income (Loss), Net of Tax	107					107			0
Dividends, Common Stock	(5,380)							(5,380)
Dividends, Preferred Stock	(195)							(195)
Stock Repurchased During Period, Shares		(37,282)
Stock Repurchased During Period, Value	(3,253)						(3,253)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		43,586
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised	2,847			(110)			2,957
Stock Issued During Period, Shares, Conversion of Convertible Securities		3,933
Stock Issued During Period, Value, Conversion of Convertible Securities	0		(34)	5			29
ESOP Debt Impacts	158				59			99
Noncontrolling Interest, Period Increase (Decrease)	(265)			(117)					(148)
Common Stock, Shares, Outstanding, Ending Balance at Mar. 31, 2019		2,508,330
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2019	$ 55,552	$ 4,009	933	63,624	(1,145)	(14,968)	(99,484)	102,103	480
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.7172
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2018		2,501,580
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2018	$ 54,443	$ 4,009	946	63,679	(1,178)	(15,156)	(99,480)	101,170	453
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent								2,745
Net Income (Loss) Attributable to Noncontrolling Interest	31								31
Net Earnings	2,776
Other Comprehensive Income (Loss), Net of Tax	191					188			3
Dividends, Common Stock	(1,799)							(1,799)
Dividends, Preferred Stock	(64)							(64)
Stock Repurchased During Period, Shares		(12,945)
Stock Repurchased During Period, Value	(1,250)						(1,250)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		18,197
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised	1,178			(57)			1,235
Stock Issued During Period, Shares, Conversion of Convertible Securities		1,498
Stock Issued During Period, Value, Conversion of Convertible Securities	0		(13)	(2)			11
ESOP Debt Impacts	84				33			51
Noncontrolling Interest, Period Increase (Decrease)	(7)			0					(7)
Common Stock, Shares, Outstanding, Ending Balance at Mar. 31, 2019		2,508,330
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2019	$ 55,552	$ 4,009	933	63,624	(1,145)	(14,968)	(99,484)	102,103	480
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 2.2377
Common Stock, Shares, Outstanding, Beginning Balance at Jun. 30, 2019		2,504,751
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Jun. 30, 2019	$ 47,579	$ 4,009	928	63,827	(1,146)	(14,936)	(100,406)	94,918	385
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent								10,227
Net Income (Loss) Attributable to Noncontrolling Interest	90								90
Net Earnings	10,317
Other Comprehensive Income (Loss), Net of Tax	(997)					(980)			(17)
Dividends, Common Stock	(5,587)							(5,587)
Dividends, Preferred Stock	(193)							(193)
Stock Repurchased During Period, Shares		(61,346)
Stock Repurchased During Period, Value	(7,405)						(7,405)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		28,965
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised	2,109			145			1,964
Stock Issued During Period, Shares, Conversion of Convertible Securities		3,273
Stock Issued During Period, Value, Conversion of Convertible Securities	0		(28)	4			24
ESOP Debt Impacts	175				66			109
Noncontrolling Interest, Period Increase (Decrease)	(57)			0					(57)
Common Stock, Shares, Outstanding, Ending Balance at Mar. 31, 2020		2,475,643
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2020	$ 45,941	$ 4,009	900	63,976	(1,080)	(15,916)	(105,823)	99,474	401
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Dividends, Per Share, Cash Paid	$ 0.7459
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2019		2,469,453
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Beginning Balance at Dec. 31, 2019	$ 45,908	$ 4,009	911	64,019	(1,112)	(14,942)	(105,761)	98,414	370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income (Loss) Attributable to Parent								2,917
Net Income (Loss) Attributable to Noncontrolling Interest	40								40
Net Earnings	2,957
Other Comprehensive Income (Loss), Net of Tax	(985)					(974)			(11)
Dividends, Common Stock	(1,850)							(1,850)
Dividends, Preferred Stock	(64)							(64)
Stock Repurchased During Period, Shares		(7,313)
Stock Repurchased During Period, Value	(901)						(901)
Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture		12,234
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised	785			(44)			829
Stock Issued During Period, Shares, Conversion of Convertible Securities		1,269
Stock Issued During Period, Value, Conversion of Convertible Securities	0		(11)	1			10
ESOP Debt Impacts	89				32			57
Noncontrolling Interest, Period Increase (Decrease)	2			0					2
Common Stock, Shares, Outstanding, Ending Balance at Mar. 31, 2020		2,475,643
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Ending Balance at Mar. 31, 2020	$ 45,941	$ 4,009	$ 900	$ 63,976	$ (1,080)	$ (15,916)	$ (105,823)	$ 99,474	$ 401