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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Cash provided by operating activities:    
Net (loss) income $ (109.8) $ 21.8
Adjustments to reconcile net (loss) income to net cash provided by operating activities:    
Depreciation and amortization 75.6 94.1
Gain from discontinued operations   (47.2)
Gain on sale of development project and other assets   (2.3)
Gain on purchase and cancellation of convertible debentures (4.7) (3.1)
Loss on disposal of fixed assets 0.2  
Stock-based compensation expense 1.4 2.1
Long-lived asset and goodwill impairment 84.7  
Equity in earnings from unconsolidated affiliates (27.9) (28.3)
Distributions from unconsolidated affiliates 36.5 40.0
Unrealized foreign exchange loss (gain) 19.1 (49.3)
Change in fair value of derivative instruments (20.0) (8.0)
Change in deferred income taxes (16.8) 23.6
Change in other operating balances    
Accounts receivable   4.3
Inventory 1.1 1.7
Prepayments and other assets 42.1 20.2
Accounts payable 0.3 (6.1)
Accruals and other liabilities 10.1 4.2
Cash provided by operating activities 91.9 67.7
Cash provided by investing activities:    
Change in restricted cash 2.6 8.0
Proceeds from sale of assets and equity investments, net   326.3
Contribution to unconsolidated affiliate   (0.5)
Capitalized development costs   (0.8)
Reimbursement of costs for third-party construction project 4.7  
Purchase of property, plant and equipment (6.5) (9.4)
Cash provided by investing activities 0.8 323.6
Cash used in financing activities:    
Proceeds from senior secured term loan facility, net of discount 679.0  
Common share repurchases (13.9)  
Repayment of corporate and project-level debt (526.4) (387.1)
Repayment of convertible debentures (187.4) (18.7)
Deferred financing costs (16.2)  
Dividends paid to common shareholders   (8.5)
Dividends paid to noncontrolling interests   (3.8)
Dividends paid to preferred shareholders (6.4) (6.7)
Cash used in financing activities (71.3) (424.8)
Increase (decrease) in cash and cash equivalents 21.4 (33.5)
Less cash at discontinued operations   3.9
Cash and cash equivalents at beginning of period 72.4 106.0
Cash and cash equivalents at end of period 93.8 76.4
Supplemental cash flow information    
Interest paid 43.3 75.5
Income taxes paid, net 2.8 4.1
Accruals for construction in progress $ 0.4 $ 1.2