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Debt (Senior Secured Credit Facility) (Narrative) (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, letters of credit issued | $ 151.8 | $ 115.1 |  | $ 151.8 | $ 151.8
Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 1,750.0 |  |  | 1,750.0 | 1,750.0
Line of credit facility, unused facility fee (percentage) | 0.20% | 0.20% |  |  |
Line of credit facility, letters of credit issued | $ 133.6 | $ 98.0 |  | 133.6 | 133.6
Credit Facility [Member] | Eurocurrency Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate description | 1.00% |  |  |  |
Credit Facility [Member] | Federal Funds Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate description | 0.50% |  |  |  |
Credit Facility [Member] | Plan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Permitted acquisitions amount |  |  |  |  | 100.0
Credit Facility [Member] | Revolving Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 1,350.0 |  |  | 1,350.0 | 1,350.0
Line of credit facility, remaining borrowing capacity | 1,200.0 | $ 900.0 |  | 1,200.0 | 1,200.0
Credit Facility [Member] | Term Loan [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 400.0 |  |  | 400.0 | $ 400.0
Line of credit facility, term loan, amount of quarterly principal installment payments |  |  |  | $ 2.5 |
Line of credit facility, interest rate (percentage) | 1.40% | 3.05% |  | 1.40% | 1.40%
Credit Facility [Member] | Term Loan [Member] | Forecast [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, term loan, amount of quarterly principal installment payments |  |  | $ 5.0 |  |
Credit Facility [Member] | Sublimit in Foreign Denominations [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 300.0 |  |  | $ 300.0 | $ 300.0
Long-term line of credit | 33.0 | $ 138.0 |  | 33.0 | 33.0
Line of credit facility, remaining borrowing capacity | 267.3 | 162.4 |  | 267.3 | 267.3
Credit Facility [Member] | Letters of Credit [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | 650.0 |  |  | 650.0 | 650.0
Line of credit facility, capacity available for letters of credit | $ 516.4 | $ 552.0 |  | $ 516.4 | $ 516.4
Credit Facility [Member] | Letters of Credit [Member] | Commercial and/or Financial Standby [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 1.25% | 1.25% |  | 1.25% | 1.25%
Credit Facility [Member] | Letters of Credit [Member] | Performance Standby [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 0.375% | 0.375% |  | 0.375% | 0.375%
Credit Facility [Member] | Letter of Credit in Alternative Currencies [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 200.0 |  |  | $ 200.0 | $ 200.0
Credit Facility [Member] | Swing Line Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, maximum borrowing capacity | $ 125.0 |  |  | $ 125.0 | $ 125.0
Minimum [Member] | Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, unused facility fee (percentage) | 0.20% |  |  |  |
Percentage of consolidated EBITDA threshold, combined subsidiary guarantors | 15.00% |  |  | 15.00% | 15.00%
Consolidated interest coverage ratio | 3.00 |  |  | 3.00 | 3.00
Minimum [Member] | Credit Facility [Member] | Eurocurrency Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate description | 1.25% |  |  |  |
Minimum [Member] | Credit Facility [Member] | Base Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate description | 0.25% |  |  |  |
Minimum [Member] | Credit Facility [Member] | Letters of Credit [Member] | Commercial and/or Financial Standby [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 1.25% |  |  | 1.25% | 1.25%
Minimum [Member] | Credit Facility [Member] | Letters of Credit [Member] | Performance Standby [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 0.375% |  |  | 0.375% | 0.375%
Maximum [Member] | Credit Facility [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, unused facility fee (percentage) | 0.30% |  |  |  |
Percentage of consolidated EBITDA threshold, combined subsidiary guarantors | 80.00% |  |  | 80.00% | 80.00%
Maximum consolidated leverage ratio | 3.50 |  |  | 3.50 | 3.50
Maximum [Member] | Credit Facility [Member] | Eurocurrency Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate description | 1.75% |  |  |  |
Maximum [Member] | Credit Facility [Member] | Base Rate [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate description | 0.75% |  |  |  |
Maximum [Member] | Credit Facility [Member] | Plan [Member] | Permitted Acquisition [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum consolidated leverage ratio | 4.00 |  |  | 4.00 | 4.00
Number of fiscal quarters subsequent to quarter in which right was exercised | 4 |  |  | 4 | 4
Number of times right may be exercised | 2 |  |  | 2 | 2
Maximum [Member] | Credit Facility [Member] | Letters of Credit [Member] | Commercial and/or Financial Standby [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 1.75% |  |  | 1.75% | 1.75%
Maximum [Member] | Credit Facility [Member] | Letters of Credit [Member] | Performance Standby [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 0.75% |  |  | 0.75% | 0.75%
Weighted Average [Member] | Credit Facility [Member] | Revolving Loans [Member] |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, interest rate (percentage) | 1.87% | 3.50% |  | 1.87% | 1.87%

X
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- Definition Number of subsequent fiscal quarters that the Consolidated Leverage Ratio may be temporarily increased to up to a certain multiple, after the initial fiscal quarter in which such ratio was increased. + References No definition available. + Details
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- Definition Number of times during the term of the Credit Facility that the right to permit the consolidated leverage ratio to exceed a specified threshold may be or has been exercised. + 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=120391452&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=120398452&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=120400017&loc=d3e572229-122910 + Details
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- Definition The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for a specific purpose other than for financing goods acquired for inventory or imminent delivery to a customer. + References No definition available. + 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=120391452&loc=d3e13212-122682 + Details
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