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Commitments and Contingencies Narrative (Details)
$ in Billions
 3 Months Ended
Mar. 31, 2021
USD ($)
Contingencies [Line Items]  
Other Commitments, Description The Company has entered into agreements to purchase companies in the health care sector, most notably Change Healthcare (NASDAQ: CHNG), which is expected to close in the second half of 2021, subject to regulatory approvals and other customary closing conditions.
Payments To Be Made To Acquire Businesses $ 12