Consolidated Statements of Cash Flows - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Cash Provided by (Used in) Operating Activities	$ 2,791,000,000	$ 4,274,000,000
Cash flows from investing activities
Purchases of trading securities	(29,067,000,000)	(22,738,000,000)
Proceeds from sales of trading securities	24,252,000,000	23,099,000,000
Proceeds from maturities and repayments of trading securities	4,992,000,000	1,754,000,000
Purchases of available-for-sale securities	(1,375,000,000)	(2,298,000,000)
Proceeds from sales of available-for-sale securities	2,072,000,000	3,032,000,000
Proceeds from maturities and repayments of available-for-sale securities	865,000,000	932,000,000
Purchases of mortgage loans acquired as held-for-investment	(68,834,000,000)	(34,756,000,000)
Proceeds from sales of mortgage loans acquired as held-for-investment	2,464,000,000	2,308,000,000
Proceeds from repayments of mortgage loans acquired as held-for-investment	107,876,000,000	52,425,000,000
Advances under secured lending arrangements	(17,047,000,000)	(7,997,000,000)
Repayments of secured lending arrangements	591,000,000	290,000,000
Net proceeds from dispositions of real estate owned and other recoveries	260,000,000	268,000,000
Net (increase) decrease in securities purchased under agreements to resell	5,688,000,000	(15,363,000,000)
Derivative premiums and terminations, swap collateral, and exchange settlement payments, net	(8,357,000,000)	(3,142,000,000)
Other, net	(138,000,000)	(187,000,000)
Net Cash Provided by (Used in) Investing Activities	24,242,000,000	(2,373,000,000)
Cash flows from financing activities
Increase in liquidation preference of senior preferred stock	0	0
Payment of cash dividends on senior preferred stock	0	(1,477,000,000)
Other, net	(25,000,000)	(1,000,000)
Net Cash Provided by (Used in) Financing Activities	(7,898,000,000)	(2,935,000,000)
Net increase (decrease) in cash and cash equivalents (includes restricted cash and cash equivalents)	19,135,000,000	(1,034,000,000)
Cash and cash equivalents (includes restricted cash and cash equivalents) at beginning of year	5,189,000,000	7,273,000,000
Cash and cash equivalents (includes restricted cash and cash equivalents) at end of period	24,324,000,000	6,239,000,000
Cash paid for:
Debt interest	17,962,000,000	17,366,000,000
Income taxes	0	0
Held by Freddie Mac
Cash flows from financing activities
Proceeds from issuance of debt	473,937,000,000	167,026,000,000
Repayments of debt	(454,607,000,000)	(150,248,000,000)
Held by consolidated trusts
Cash flows from financing activities
Proceeds from issuance of debt	73,626,000,000	36,092,000,000
Repayments of debt	(100,829,000,000)	$ (54,327,000,000)
Cash and cash equivalents (includes restricted cash and cash equivalents) at beginning of year	870,000,000
Cash and cash equivalents (includes restricted cash and cash equivalents) at end of period	$ 17,856,000,000