Long-Term Debt (Narrative) (Details) - USD ($) | May 22, 2018 | Jun. 30, 2018 | Jun. 30, 2017 | Mar. 31, 2018 | Dec. 31, 2017 |
Debt Instrument [Line Items] | | | | | |
Proceeds from revolving credit facilities | | $ 659,000,000 | $ 223,000,000 | | |
Weighted average interest rate | | 4.79% | | 5.15% | 4.69% |
Global ABL Facility [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Maturity date | | Sep. 30, 2022 | | | |
Credit facility, maximum borrowing capacity | | $ 800,000,000 | | | |
Proceeds from revolving credit facilities | | 200,000,000 | | | |
Credit facility, remaining borrowing capacity | | $ 414,000,000 | | | |
Weighted average interest rate | | 3.77% | | | 3.19% |
Global ABL Facility [Member] | U.S. [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | $ 675,000,000 | | | |
Global ABL Facility [Member] | Canada [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | 65,000,000 | | | |
Global ABL Facility [Member] | United Kingdom [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | 7,000,000 | | | |
Global ABL Facility [Member] | Australia [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | 15,000,000 | | | |
Global ABL Facility [Member] | Belgium [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | 7,000,000 | | | |
Global ABL Facility [Member] | Norway [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | 18,000,000 | | | |
Global ABL Facility [Member] | Netherlands [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Credit facility, maximum borrowing capacity | | $ 13,000,000 | | | |
Secured Term Loan [Member] | Senior Secured Term Loan B [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Debt maturity period | | 7 years | | | |
Principal amount | | $ 400,000,000 | | | |
Term loan annual amortization percentage | | 1.00% | | | |
Maturity date | | Sep. 30, 2024 | | | |
Term Loan accordion feature | | $ 200,000,000 | | | |
Percentage of capital stock in foreign subsidiaries securing Term Loan B | | 65.00% | | | |
Weighted average interest rate | | 5.60% | | | 5.18% |
Secured Term Loan [Member] | Senior Secured Term Loan B [Member] | Base Rate [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 2.50% | | | | |
Secured Term Loan [Member] | Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 3.50% | | | | |
Secured Term Loan [Member] | Senior Secured Term Loan B, Refinanced [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Prepayment premium | 1.00% | | | | |
Secured Term Loan [Member] | Senior Secured Term Loan B, Refinanced [Member] | Base Rate [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 2.00% | | | | |
Secured Term Loan [Member] | Senior Secured Term Loan B, Refinanced [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 3.00% | | | | |
Secured Term Loan [Member] | Senior Secured Leverage Ratio Is No More Than 2.75 to 1.00 [Member] | Senior Secured Term Loan B [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Senior secured leverage ratio | | 2.75 | | | |
Repayment of Term Loan, percentage | | 25.00% | | | |
Secured Term Loan [Member] | Senior Secured Leverage Ratio Is No More Than 2.50 to 1.00 [Member] | Senior Secured Term Loan B [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Senior secured leverage ratio | | 2.50 | | | |
Repayment of Term Loan, percentage | | 0.00% | | | |
Secured Term Loan [Member] | Minimum [Member] | Senior Secured Term Loan B [Member] | Base Rate [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 2.00% | | | | |
Secured Term Loan [Member] | Minimum [Member] | Senior Secured Term Loan B [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 1.00% | | | | |
Secured Term Loan [Member] | Minimum [Member] | Senior Secured Term Loan B, Refinanced [Member] | Base Rate [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 1.00% | | | | |
Secured Term Loan [Member] | Minimum [Member] | Senior Secured Term Loan B, Refinanced [Member] | London Interbank Offered Rate (LIBOR) [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Variable interest rate | 0.00% | | | | |
Secured Term Loan [Member] | Maximum [Member] | Senior Secured Term Loan B [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Senior secured leverage ratio | | 4 | | | |
Repayment of Term Loan, percentage | | 50.00% | | | |