Restructuring Program	6 Months Ended
	Jun. 30, 2023
Restructuring and Related Activities [Abstract]
Restructuring Program	Restructuring ProgramDuring the second quarter of 2023, the Company developed an enterprise-wide restructuring plan intended to streamline and simplify the organization, improve efficiency and reduce costs. In connection with the development of this plan and the recently completed acquisitions of Signify Health and Oak Street Health, the Company also conducted a strategic review of its various transformation initiatives and determined that it would terminate certain initiatives, including providing clinical trials services. In connection with the restructuring plan, during the three months ended June 30, 2023, the Company recorded a $496 million pre-tax restructuring charge, comprised of $344 million of severance and employee-related costs associated with corporate workforce optimization and $152 million of asset impairment charges. The restructuring charge is reflected in the Corporate/Other segment. The severance and employee-related costs were recorded in accrued expenses and the asset impairments were recorded as a reduction of property and equipment, net, on the unaudited condensed consolidated balance sheet at June 30, 2023. There were no payments made related to the severance and employee-related costs during the three months ended June 30, 2023. The restructuring program is expected to be substantially complete by the end of 2023. Severance and employee-related costs consist primarily of salary continuation benefits, prorated annual incentive compensation, continuation of health care benefits and outplacement services. Severance and employee-related benefits are determined pursuant to the Company’s written severance plans and are recognized when the benefits are determined to be probable of being paid and are reasonably estimable.