v3.5.0.2
Guarantor Information - Guarantor Condensed Consolidating Statement of Cash Flows Information (Detail) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations $ (11.4) $ 45.1  
Cash provided by (used in) operating activities - discontinued operations 5.2 (8.9)  
Net cash provided by (used in) operating activities (6.2) 36.2  
Cash flows from investing activities:      
Capital expenditures (119.6) (73.9)  
Proceeds from sales of business assets 11.5 6.3  
Cash used in investing activities - continuing operations (108.1) (67.6)  
Cash provided by investing activities - discontinued operations 26.8 (0.9)  
Net cash provided by (used in) investing activities (81.3) (68.5)  
Cash flows from financing activities:      
Issuance of long-term debt   248.8  
Long-term debt payments (1.7) (196.1)  
Fees paid related to financing activities   (3.5)  
Deferred acquisition payments (15.0) (10.0)  
Dividends paid (22.8) (23.1)  
Distribution to noncontrolling interest (7.1) (8.4)  
Share-based compensation plan activities (0.9) (6.2)  
Net cash provided by (used in) financing activities (47.5) 1.5  
Effect of exchange rate changes on cash and cash equivalents 5.4 (4.6)  
Net change in cash and cash equivalents (129.6) (35.4)  
Cash and cash equivalents at beginning of period 258.0 166.8 $ 166.8
Cash and cash equivalents at end of period 128.4 131.4 258.0
Reportable Legal Entities [Member] | Parent Company [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations 38.5 40.0  
Net cash provided by (used in) operating activities 38.5 40.0  
Cash flows from investing activities:      
Capital expenditures (0.1) (0.4)  
Cash used in investing activities - continuing operations (0.1) (0.4)  
Net cash provided by (used in) investing activities (0.1) (0.4)  
Cash flows from financing activities:      
Fees paid related to financing activities   (0.3)  
Deferred acquisition payments (15.0) (10.0)  
Dividends paid (22.8) (23.1)  
Share-based compensation plan activities (0.9) (6.2)  
Net cash provided by (used in) financing activities (38.7) (39.6)  
Net change in cash and cash equivalents (0.3)    
Cash and cash equivalents at beginning of period 0.3    
Cash and cash equivalents at end of period     0.3
Reportable Legal Entities [Member] | Eagle Spinco Inc [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations 8.5 10.1  
Net cash provided by (used in) operating activities 8.5 10.1  
Cash flows from financing activities:      
Long-term debt payments   (194.4)  
Intercompany financing   194.4  
Distribution to affiliate (8.5) (10.1)  
Net cash provided by (used in) financing activities (8.5) (10.1)  
Reportable Legal Entities [Member] | Guarantor Subsidiaries Excluding Eagle Spinco Inc [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations (19.7) 30.5  
Cash provided by (used in) operating activities - discontinued operations 9.4 (1.7)  
Net cash provided by (used in) operating activities (10.3) 28.8  
Cash flows from investing activities:      
Capital expenditures (115.0) (69.3)  
Proceeds from sales of business assets 0.4 5.6  
Cash used in investing activities - continuing operations (114.6) (63.7)  
Cash provided by investing activities - discontinued operations 7.3 (1.6)  
Net cash provided by (used in) investing activities (107.3) (65.3)  
Cash flows from financing activities:      
Issuance of long-term debt   248.8  
Long-term debt payments (1.7) (1.7)  
Intercompany financing   (194.4)  
Fees paid related to financing activities   (3.2)  
Distribution to affiliate (17.5) (10.1)  
Net cash provided by (used in) financing activities (19.2) 39.4  
Net change in cash and cash equivalents (136.8) 2.9  
Cash and cash equivalents at beginning of period 161.7 78.2 78.2
Cash and cash equivalents at end of period 24.9 81.1 161.7
Reportable Legal Entities [Member] | Guarantor Subsidiaries Including Eagle Spinco Inc [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations (19.7) 30.5  
Cash provided by (used in) operating activities - discontinued operations 9.4 (1.7)  
Net cash provided by (used in) operating activities (10.3) 28.8  
Cash flows from investing activities:      
Capital expenditures (115.0) (69.3)  
Proceeds from sales of business assets 0.4 5.6  
Cash used in investing activities - continuing operations (114.6) (63.7)  
Cash provided by investing activities - discontinued operations 7.3 (1.6)  
Net cash provided by (used in) investing activities (107.3) (65.3)  
Cash flows from financing activities:      
Issuance of long-term debt   248.8  
Long-term debt payments (1.7) (196.1)  
Fees paid related to financing activities   (3.2)  
Distribution to affiliate (17.5) (10.1)  
Net cash provided by (used in) financing activities (19.2) 39.4  
Net change in cash and cash equivalents (136.8) 2.9  
Cash and cash equivalents at beginning of period 161.7 78.2 78.2
Cash and cash equivalents at end of period 24.9 81.1 161.7
Reportable Legal Entities [Member] | Non-Guarantor Subsidiaries [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations 6.9 (2.7)  
Cash provided by (used in) operating activities - discontinued operations (4.2) (7.2)  
Net cash provided by (used in) operating activities 2.7 (9.9)  
Cash flows from investing activities:      
Capital expenditures (4.5) (4.2)  
Proceeds from sales of business assets 11.1 0.7  
Cash used in investing activities - continuing operations 6.6 (3.5)  
Cash provided by investing activities - discontinued operations 19.5 0.7  
Net cash provided by (used in) investing activities 26.1 (2.8)  
Cash flows from financing activities:      
Distribution to noncontrolling interest (7.1) (8.4)  
Distribution to affiliate (19.6) (12.6)  
Net cash provided by (used in) financing activities (26.7) (21.0)  
Effect of exchange rate changes on cash and cash equivalents 5.4 (4.6)  
Net change in cash and cash equivalents 7.5 (38.3)  
Cash and cash equivalents at beginning of period 96.0 88.6 88.6
Cash and cash equivalents at end of period 103.5 50.3 $ 96.0
Eliminations [Member]      
Condensed Cash Flow Statements, Captions [Line Items]      
Cash provided by (used in) operating activities - continuing operations (37.1) (22.7)  
Net cash provided by (used in) operating activities (37.1) (22.7)  
Cash flows from financing activities:      
Distribution to affiliate 37.1 22.7  
Net cash provided by (used in) financing activities $ 37.1 $ 22.7