Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Net cash used in operating activities
Net cash used in operating activities	$ (3,982)	$ (1,506)
Cash flows provided by investing activities:
Proceeds from maturities and paydowns of trading securities held for investment	1,109	484
Proceeds from sales of trading securities held for investment	1,313	992
Proceeds from maturities and paydowns of available-for-sale securities	1,778	2,279
Proceeds from sales of available-for-sale securities	7,584	5,311
Purchases of loans held for investment	(97,024)	(98,042)
Net change in restricted cash	(6,818)	(4,846)
Advances to lenders	(57,956)	(62,110)
Proceeds from disposition of acquired property and preforeclosure sales	8,557	11,384
Net change in federal funds sold and securities purchased under agreements to resell or similar arrangements	5,025	8,940
Other, net	(661)	(65)
Net cash provided by investing activities	114,863	136,609
Cash flows used in financing activities:
Payments of cash dividends on senior preferred stock to Treasury	(3,778)	(3,716)
Other, net	30	(46)
Net cash used in financing activities	(101,936)	(137,813)
Net increase (decrease) in cash and cash equivalents	8,945	(2,710)
Cash and cash equivalents at beginning of period	14,674	22,023
Cash and cash equivalents at end of period	23,619	19,313
Cash paid during the period for:
Interest	52,354	52,679
Income taxes	610	370
Fannie Mae [Member]
Cash flows provided by investing activities:
Proceeds from repayments of loans acquired as held for investment	11,804	12,487
Proceeds from sales of loans acquired as held for investment of Fannie Mae	1,964	366
Cash flows used in financing activities:
Proceeds from issuance of debt	432,025	213,648
Payments to redeem debt	(456,586)	(249,610)
Consolidated Trusts [Member]
Cash flows provided by investing activities:
Proceeds from repayments of loans acquired as held for investment	238,188	259,429
Cash flows used in financing activities:
Proceeds from issuance of debt	171,004	167,880
Payments to redeem debt	$ (244,631)	$ (265,969)