Schedule I - Condensed Financial Information of Registrant - Unconsolidated Condensed Balance Sheets (Details) - USD ($)
$ in Millions
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Nov. 20, 2014
Nov. 19, 2014
Current Assets          
Cash and cash equivalents $ 27.5 $ 33.0 $ 88.3 $ 0.0  
Prepaid expenses and other current assets 63.4 68.2      
Total current assets 938.9 871.3      
Total assets 2,650.7 2,623.1      
Current Liabilities          
Accrued expenses and other current liabilities 216.3 167.1      
Total current liabilities 911.6 855.4      
Total liabilities 2,047.8 2,276.2      
Stockholders’ Equity          
Preferred stock: $0.01 par value; 100 shares authorized, zero shares issued and outstanding at June 30, 2017 and June 30, 2016 0.0 0.0      
Common stock: $0.01 par value; 250,000,000 shares authorized and 90,969,919 shares issued and outstanding at June 30,2017, 100,000,000 shares authorized and 71,922,836 shares issued and outstanding at June 30, 2016 0.9 0.7      
Additional paid-in capital 625.3 373.9      
Accumulated deficit (23.3) (27.7)      
Total stockholders’ equity 602.9 346.9 335.8   $ 0.0
Total liabilities and stockholders’ equity 2,650.7 2,623.1      
Presidio, Inc. [Member]          
Current Assets          
Cash and cash equivalents 0.7 26.1 $ 26.0 $ 0.0  
Prepaid expenses and other current assets 1.3 0.9      
Total current assets 2.0 27.0      
Deferred tax asset 2.7 3.0      
Investment in subsidiaries 605.2 317.1      
Total assets 609.9 347.1      
Current Liabilities          
Accrued expenses and other current liabilities 7.0 0.2      
Total current liabilities 7.0 0.2      
Total liabilities 7.0 0.2      
Stockholders’ Equity          
Preferred stock: $0.01 par value; 100 shares authorized, zero shares issued and outstanding at June 30, 2017 and June 30, 2016 0.0 0.0      
Common stock: $0.01 par value; 250,000,000 shares authorized and 90,969,919 shares issued and outstanding at June 30,2017, 100,000,000 shares authorized and 71,922,836 shares issued and outstanding at June 30, 2016 0.9 0.7      
Additional paid-in capital 625.3 373.9      
Accumulated deficit (23.3) (27.7)      
Total stockholders’ equity 602.9 346.9      
Total liabilities and stockholders’ equity $ 609.9 $ 347.1