Other Operating Income, Net	12 Months Ended
Dec. 31, 2020
Other Income And Expenses [Abstract]
Other Operating Income, Net	Note S: Other Operating Income, Net Other operating income, net, is comprised generally of gains and losses on the sale of assets; asset and portfolio rationalization charges; recoveries and losses related to certain customer accounts receivable; rental, royalty and services income; accretion expense, depreciation expense and gains and losses related to asset retirement obligations. These net amounts represented income of $59.8 million, $9.1 million and $18.2 million in 2020, 2019 and 2018, respectively. Other operating income, net for 2020 included $69.9 million of nonrecurring gains on the sales of investment land and divested assets in Austin, Texas; Riverside, California; and Augusta, Kansas. These asset sales collectively generated net cash proceeds of $122.8 million. These gains were recorded in the West Group. 2019 income included the reversal of $6.9 million of accruals for sales tax and unclaimed property contingencies. The 2018 amount reflected $18.8 million of asset and portfolio rationalization charges, reported in the West Group, related to the Company’s evaluation of the recoverability of certain long-lived assets for underperforming ready mixed concrete operations, offset by $7.7 million in net gains on legal settlements and $25.3 million in gains on the sale of assets, primarily excess land.

Other Operating Income, Net

12 Months Ended

Dec. 31, 2020

Other Income And Expenses [Abstract]

Note S: Other Operating Income, Net

Other operating income, net, is comprised generally of gains and losses on the sale of assets; asset and portfolio rationalization charges; recoveries and losses related to certain customer accounts receivable; rental, royalty and services income; accretion expense, depreciation expense and gains and losses related to asset retirement obligations. These net amounts represented income of $59.8 million, $9.1 million and $18.2 million in 2020, 2019 and 2018, respectively. Other operating income, net for 2020 included $69.9 million of nonrecurring gains on the sales of investment land and divested assets in Austin, Texas; Riverside, California; and Augusta, Kansas. These asset sales collectively generated net cash proceeds of $122.8 million. These gains were recorded in the West Group. 2019 income included the reversal of $6.9 million of accruals for sales tax and unclaimed property contingencies. The 2018 amount reflected $18.8 million of asset and portfolio rationalization charges, reported in the West Group, related to the Company’s evaluation of the recoverability of certain long-lived assets for underperforming ready mixed concrete operations, offset by $7.7 million in net gains on legal settlements and $25.3 million in gains on the sale of assets, primarily excess land.