XML 100 R84.htm IDEA: XBRL DOCUMENT v3.20.4
Fair Value Measurements and Fair Value of Financial Instruments Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset (Liability), Gain (Loss), Statement of Income [Extensible List] us-gaap:SellingGeneralAndAdministrativeExpense  
Contingent Consideration [Member]    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at Beginning of Year $ 55 $ 37
Acquisitions (including assumed balances) 28 24
Payments (4) (3)
Changes in fair value included in earnings (9) (3)
Balance at End of Year $ 70 $ 55