Consolidated Balance Sheets - USD ($) $ in Millions		Jun. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents		$ 1,405.4	$ 1,551.4
Marketable securities		88.1	83.2
Accounts receivable, net of allowance of $5.2 and $3.4		532.1	491.8
Other current assets (includes $4.4 and $4.3 in restricted cash)		319.2	364.4
Performance bonds and guaranty fund contributions		79,441.4	37,077.0
Total current assets		81,786.2	39,567.8
Property, net of accumulated depreciation and amortization of $894.4 and $867.5		538.6	544.0
Intangible assets—trading products	[1]	17,175.3	17,175.3
Intangible assets—other, net		4,931.7	5,117.7
Goodwill		10,742.5	10,742.5
Other assets (includes $0.7 and $0.9 in restricted cash)		2,040.5	2,068.0
Total Assets		117,214.8	75,215.3
Liabilities and Equity
Accounts payable		88.0	61.9
Other current liabilities		672.5	1,384.8
Performance bonds and guaranty fund contributions		79,440.9	37,075.8
Total current liabilities		80,201.4	38,522.5
Long-term debt		3,440.9	3,743.2
Deferred income tax liabilities, net		5,607.3	5,635.2
Other liabilities		1,126.3	1,155.1
Total Liabilities		90,375.9	49,056.0
Shareholders' Equity:
Preferred stock, $0.01 par value, 10,000 shares authorized at June 30, 2020 and December 31, 2019; none issued		0.0	0.0
Additional paid-in capital		21,148.9	21,113.2
Retained earnings		5,668.5	5,008.7
Accumulated other comprehensive income (loss)		(13.1)	3.4
Total CME Group Shareholders’ Equity		26,807.9	26,128.9
Non-controlling interests		31.0	30.4
Total Equity		26,838.9	26,159.3
Total Liabilities and Equity		117,214.8	75,215.3
Class A Common Stock [Member]
Shareholders' Equity:
Common stock		3.6	3.6
Class B Common Stock [Member]
Shareholders' Equity:
Common stock		$ 0.0	$ 0.0

[1] Trading products represent futures and options products acquired in our business combinations with CBOT Holdings, Inc., NYMEX Holdings, Inc. and The Board of Trade of Kansas City, Missouri, Inc. Clearing and transaction fees are generated through the trading of these products. These trading products, most of which have traded for decades, require authorization from the Commodity Futures Trading Commission (CFTC). Product authorizations from the CFTC have no term limits.