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Senior Secured Credit Facilities Narrative (Details) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 06, 2017 | Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Debt Instrument [Line Items] |  |  |  |
Proceeds from Issuance of Long-term Debt |  | $ 5.3 | $ 431.4 |
Term Loan A [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  | 10.0 |  |
Term Loan B [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Payment for Debt Extinguishment or Debt Prepayment Cost |  | 15.5 |  |
Metaldyne Performance Group, Inc. [Member] | Term Loan A [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from Issuance of Long-term Debt | $ 100.0 |  |  |
Metaldyne Performance Group, Inc. [Member] | Term Loan B [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Proceeds from Issuance of Long-term Debt | 1,550.0 |  |  |
Metaldyne Performance Group, Inc. [Member] | Multi-Currency Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Line of Credit | $ 932.0 |  |  |
Revolving Credit Facility [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term Line of Credit |  | 0.0 |  | $ 0.0
Line of Credit Facility, Remaining Borrowing Capacity |  | 893.8 |  |
Line of Credit Facility, Standby Letters of Credit Issued Against the Facility |  | $ 38.2 |  |

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- Definition The amount of total standby letters of credit issued against the revolving credit facility at the reporting date, which represents a reduction of the available borrowing capacity. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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