CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 1,777.3	$ 1,919.5
Short-term investments	182.0	186.8
Accounts receivable, net of allowances of $30.0 in 2012 and $28.0 in 2011	758.3	694.2
Deferred tax assets, net	49.7	53.9
Other current assets	177.0	114.4
Total current assets	2,944.3	2,968.8
Property and equipment, net of accumulated depreciation of $286.6 in 2012 and $258.2 in 2011	298.3	278.7
Goodwill	955.2	665.2
Intangible assets, net	310.5	221.6
Deferred tax assets, net	130.9	148.7
Other assets	147.4	112.1
Total assets	4,786.6	4,395.1
Current liabilities:
Accounts payable and accrued liabilities	430.8	538.9
Deferred revenue	661.0	598.4
Total current liabilities	1,093.4	1,141.3
Deferred tax liabilities, net	1.6	4.0
Non-current portion of deferred revenue	120.8	109.2
Long-term debt	2,104.5	2,101.8
Deferred tax liabilities, net	112.2	59.1
Unrecognized tax benefits	204.5	195.6
Other liabilities	354.7	360.2
Total liabilities	3,990.1	3,967.2
Contingencies (Note 14)
Redeemable noncontrolling interest	122.6	80.0
Shareholders' equity(deficit):
Preferred stock, par value $.01 per share; 10,000,000 shares authorized; no shares issued and outstanding	0	0
Capital surplus	385.0	405.8
Retained earnings	5,780.7	5,302.1
Treasury stock, at cost; 120,619,040 and 120,462,232 shares of common stock at June 30, 2012 and December 31, 2011, respectively	5,676.4	5,319.7
Accumulated other comprehensive loss	(47.3)	(54.6)
Total Moody's shareholders' equity (deficit)	445.4	337.0
Noncontrolling interests	228.5	10.9
Total shareholders' equity (deficit)	673.9	347.9
Total liabilities, redeemable noncontrolling interest and shareholders' equity (deficit)	4,786.6	4,395.1
Nonvoting Common Stock [Member]
Shareholders' equity(deficit):
Common stock
Common Stock [Member]
Shareholders' equity(deficit):
Common stock	$ 3.4	$ 3.4