Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net cash used in operating activities
Net cash used in operating activities	$ (3,111)	$ (1,249)
Cash flows provided by investing activities:
Proceeds from maturities and paydowns of trading securities held for investment	975	296
Proceeds from sales of trading securities held for investment	792	483
Proceeds from maturities and paydowns of available-for-sale securities	883	1,232
Proceeds from sales of available-for-sale securities	3,802	2,171
Purchases of loans held for investment	(39,935)	(44,460)
Net change in restricted cash	(2,994)	(8,897)
Advances to lenders	(25,635)	(30,804)
Proceeds from disposition of acquired property and preforeclosure sales	4,129	5,490
Net change in federal funds sold and securities purchased under agreements to resell or similar arrangements	9,800	10,720
Other, net	(545)	154
Net cash provided by investing activities	61,816	66,582
Cash flows used in financing activities:
Payments of cash dividends on senior preferred stock to Treasury	(2,859)	(1,920)
Other, net	(58)	31
Net cash used in financing activities	(54,463)	(63,496)
Net increase in cash and cash equivalents	4,242	1,837
Cash and cash equivalents at beginning of period	14,674	22,023
Cash and cash equivalents at end of period	18,916	23,860
Cash paid during the period for:
Interest	26,013	26,235
Income taxes	360	0
Fannie Mae [Member]
Cash flows provided by investing activities:
Proceeds from repayments of loans acquired as held for investment	5,026	5,348
Proceeds from sales of loans acquired as held for investment of Fannie Mae	849	0
Cash flows used in financing activities:
Proceeds from issuance of debt	180,322	114,467
Payments to redeem debt	(196,016)	(126,608)
Consolidated Trusts [Member]
Cash flows provided by investing activities:
Proceeds from repayments of loans acquired as held for investment	104,669	124,849
Cash flows used in financing activities:
Proceeds from issuance of debt	71,723	68,943
Payments to redeem debt	$ (107,575)	$ (118,409)