Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 463.4	$ 573.5
Cash committed for construction projects, including consolidated variable interest entities of $141.3 and $143.6 in 2014 and 2013, respectively	178.2	258.0
Restricted cash	63.2	70.1
Accounts receivable, less allowance for doubtful accounts of $4.4 and $4.9 in 2014 and 2013, respectively	312.5	351.5
Accounts receivable, less allowance for doubtful accounts of $4.4 and $4.9 in 2014 and 2013, respectively	215.4	248.4
Solar energy systems held for development and sale	448.0	460.1
Prepaid expenses and other current assets	453.0	423.4
Total current assets	2,133.7	2,385.0
Investments	32.1	41.1
Property, plant and equipment, net:
Non-solar energy systems, net of accumulated depreciation of $1,266.1 and $1,228.6 in 2014 and 2013, respectively	1,101.4	1,108.7
Solar energy systems, including consolidated variable interest entities of $231.7 and $157.5 in 2014 and 2013, respectively, net of accumulated depreciation of $134.3 and $119.7 in 2014 and 2013, respectively	2,394.5	2,014.2
Restricted cash	94.4	73.8
Note hedge derivative asset	814.6	514.8
Other assets	595.4	542.9
Total assets	7,166.1	6,680.5
Current liabilities:
Current portion of Semiconductor Materials debt	2.8	2.8
Current portion of Solar Energy systems debt, including financing and capital leaseback obligations, including consolidated variable interest entities of $9.6 and $5.8 in 2014 and 2013, respectively	449.0	394.7
Accounts payable	818.8	867.7
Accrued liabilities	462.8	432.7
Current portion of deferred revenue	112.5	154.7
Current portion of customer and other deposits	37.0	36.7
Total current liabilities	1,882.9	1,889.3
Solar Energy non-systems debt	879.7	868.2
Solar Energy systems debt, less current portion, including financing and capital leaseback obligations and including consolidated variable interest entities of $322.8 and $234.6 in 2014 and 2013, respectively	2,603.5	2,302.9
Customer and other deposits, less current portion	80.2	103.3
Deferred revenue, less current portion	121.6	90.0
Conversion option derivative liability	822.9	506.5
Warrant derivative liability	705.7	270.5
Other liabilities	298.3	301.0
Total liabilities	7,402.6	6,339.3
Stockholders’ (deficit) equity:
Preferred stock, $.01 par value, 50.0 shares authorized, none issued and outstanding in 2014 and 2013	0	0
Common stock, $.01 par value, 300.0 shares authorized, 267.6 and 266.9 issued and outstanding in 2014 and 2013, respectively	2.7	2.7
Additional paid-in capital	471.8	457.7
Accumulated deficit	(781.5)	(168.0)
Accumulated other comprehensive loss	(48.6)	(60.0)
Treasury stock, less than 0.1 shares in 2014 and 2013, respectively	(0.5)	(0.2)
Total SunEdison stockholders’ (deficit) equity	(356.1)	232.2
Noncontrolling interests	119.6	109.0
Total stockholders’ (deficit) equity	(236.5)	341.2
Total liabilities and stockholders’ (deficit) equity	7,166.1	6,680.5
Solar Energy [Member]
Current liabilities:
Current portion of Solar Energy systems debt, including financing and capital leaseback obligations, including consolidated variable interest entities of $9.6 and $5.8 in 2014 and 2013, respectively	449.0	394.7
Solar Energy systems debt, less current portion, including financing and capital leaseback obligations and including consolidated variable interest entities of $322.8 and $234.6 in 2014 and 2013, respectively	$ 2,603.5	$ 2,302.9