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Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Loss Contingency, Receivable Loss Contingency, Receivable Acquisition of treasury stock, shares Treasury Stock, Shares, Acquired Treasury Stock, Shares, Acquired ControllingShareholderOwnershipPercentage ControllingShareholderOwnershipPercentage Percentage of outstanding common stock owned by controlling shareholder Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Long-term debt Long-Term Debt, Excluding Current Maturities Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Weighted Average Remaining Lease Term Finance Lease, Weighted Average Remaining Lease Term Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Payments for Repurchase of Redeemable Noncontrolling Interest Payments for Repurchase of Redeemable Noncontrolling Interest Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Finance Lease, Liability, Undiscounted Excess Amount Finance Lease, Liability, Undiscounted Excess Amount Revenue from External Customers by Products and Services [Table Text Block] Revenue from Contract with Customer [Text Block] Residential [Member] Residential [Member] Residential [Member] Company Selected Measure Amount Company Selected Measure Amount Additional Paid-in Capital [Member] Additional Paid-in Capital [Member] Total Lease, Liability, Payments, Year Four Total Lease, Liability, Payments, Year Four Total Lease, Liability, Payments, Year Four Total assets Total assets Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Share Repurchase Program [Axis] Share Repurchase Program [Axis] Finance Lease, Liability, Payments, Due after Year Five Finance Lease, Liability, to be Paid, after Year Five Loss Contingencies [Line Items] Loss Contingencies [Line Items] Cover page. Cover [Abstract] Non-cash compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Deferred financing cost amortization Amortization of Debt Issuance Costs Number of Businesses Acquired Number of Businesses Acquired Finance Lease, Interest Payment on Liability Finance Lease, Interest Payment on Liability Other non-current liabilities Other Liabilities, Noncurrent Non-NEOs Non-NEOs [Member] Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, to be Paid Schedule of Cash Flow, Supplemental Disclosures Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Related Party Transaction, Purchases from Related Party Related Party Transaction, Purchases from Related Party Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Non-PEO NEO Non-PEO NEO [Member] Time-and-materials Contract [Member] Time-and-Materials Contract [Member] Equity Component [Domain] Equity Component [Domain] Finance Lease, Liability, Current Finance Lease, Liability, Current Adjustment to Compensation: Adjustment to Compensation [Axis] us-gaap_PhantomShareUnitsPSUsMember_Employees Phantom Share Units, Employee PSUs [Member] Phantom Share Units, Employee PSUs Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Commercial and Industrial [Member] Commercial and Industrial [Member] Commercial and Industrial [Member] Controlling Shareholder [Text Block] Controlling Shareholder [Text Block] Controlling Shareholder [Text Block] Weighted Average Number of Shares Outstanding, Basic Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Fixed-price Contract [Member] Fixed-Price Contract [Member] Operating income (loss) Operating income (loss) Operating Income (Loss) Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Segments [Axis] Segments [Axis] Statement [Line Items] Statement [Line Items] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Customer Relationships [Member] Customer Relationships [Member] Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchase Program, Number of Shares Authorized to be Repurchased