New Accounting Standards	12 Months Ended
	Dec. 31, 2021
New Accounting Standards [Abstract]
New Accounting Standards	New Accounting StandardsIn October 2021, the FASB issued ASU 2021-08, Accounting for Contract Assets and Contract Liabilities From Contracts With Customers, or ASU 2021-08, that requires acquiring companies to apply ASC 606 to recognize and measure contract assets and contract liabilities from contracts with customers acquired in a business combination consistent with those recorded by the acquiring company. ASU 2021-08 is effective January 1, 2023, and early adoption is permitted. Contracts with customers in the advertising and marketing business are typically short duration contracts. To the extent we acquire companies in the advertising and marketing communications business, we do not expect this standard to have a material impact on our results of operations or financial position. However, we are still in the process of assessing the impact of ASU 2021-08 on our results of operations and financial position.