Number Of Construction Projects

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Percentage represents the Company's ownership percentage in the joint venture.

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- Definition

Related Party, Payment For Leases

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- Definition

Related Party's Ownership Percentage In Joint Venture

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- Definition

Carrying amount as of the balance sheet date of obligations due all related parties.

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- Definition

The expense in the period incurred with respect to protection provided by insurance entities against risks other than risks associated with production (which are allocated to cost of sales).

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Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Related Party Transactions (Details) $ in Millions	12 Months Ended
Related Party Transactions (Details) $ in Millions	Dec. 31, 2021 USD ($) project	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Related party transactions
Expenses incurred with related party	$ 4.6	$ 3.2	$ 3.2
Chairman and Chief Executive Officer
Related party transactions
Related party, payment for leases	$ 3.6	3.2	3.1
O&G
Related party transactions
Ownership percentage in joint venture	75.00%
Related party ownership percentage in joint venture	25.00%
O&G \| Project In Los Angeles, California
Related party transactions
Number of construction projects \| project	2
Alliant
Related party transactions
Insurance expense	$ 16.4	16.0	$ 18.4
Owed to related party	$ 1.5	$ 2.7