Commitments and Contingencies (Details) $ in Millions	1 Months Ended		6 Months Ended
	Sep. 30, 2022 USD ($) appeal	Mar. 31, 2016 USD ($)	Jun. 30, 2024 USD ($)
Commitments and Contingencies [Line Items]
Payments	$ 506
Number of notices of appeal | appeal	4
Technology Infrastructure and Related Management and Support Services
Commitments and Contingencies [Line Items]
Long-term purchase commitment, amount			$ 356
BCBS Antitrust Litigation
Commitments and Contingencies [Line Items]
Payments	$ 596
Anthem, Inc. v. Express Scripts, Inc.
Commitments and Contingencies [Line Items]
Proceeds originally received at time of divestiture		$ 4,675
Anthem, Inc. v. Express Scripts, Inc. | Damages for Pharmacy Pricing
Commitments and Contingencies [Line Items]
Approximate amount of damages sought for breaches		14,800
Anthem, Inc. v. Express Scripts, Inc. | Damages for Operational Breaches
Commitments and Contingencies [Line Items]
Approximate amount of damages sought for breaches		$ 158