XML 156 R97.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Investments in and Advances to Joint Ventures - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule Of Equity Method Investments [Line Items] |  |  |
Letters of credit outstanding amount | $ 223.0 | $ 193.1 |
Write-down on unconsolidated joint venture | 15.6 | 15.5 |
Decrease in operating income | 15.6 | 15.5 |
Decrease in net income net of tax | $ 11.6 | $ 11.5 |
Decrease in earnings per share diluted | $ 0.10 | $ 0.11 |
Unconsolidated Joint Ventures |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Net distributions from (contributions to) unconsolidated joint ventures | $ (13.2) | $ 30.5 | $ 38.9
Consolidated Joint Ventures |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |
Letters of credit outstanding amount | $ 50.3 | $ 59.3 |

X
- Definition Decrease in earnings per share diluted. + References No definition available. + Details
Name: | psn_DecreaseInEarningsPerShareDiluted
Namespace Prefix: | psn_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Decrease in net income net of tax. + References No definition available. + Details
Name: | psn_DecreaseInNetIncomeNetOfTax
Namespace Prefix: | psn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Decrease in operating income. + References No definition available. + Details
Name: | psn_DecreaseInOperatingIncome
Namespace Prefix: | psn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Distributions from (contributions to) equity method investment. + References No definition available. + Details
Name: | psn_DistributionsFromContributionsToEquityMethodInvestment
Namespace Prefix: | psn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of the entity's equity method investment which has been sold. + References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentSoldCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
Name: | us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=psn_UnconsolidatedJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=psn_ConsolidatedJointVenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |