Fair Value Of Financial Instruments Unobservable Input Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)	$ 0	$ 0	$ 8
Escrow Deposit	52			$ 20	$ 16	$ 16
Payment for Contingent Consideration Liability, Operating Activities	28
Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of year	52
Fair value at end of year	10	52
Contingent Consideration liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Interest accretion	0	1
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases	10	0
Contingent Consideration liability | Fair Value, Measurements, Recurring
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of year	52	51
Fair value at end of year		52	$ 51
Contingent Consideration liability | Fair Value, Measurements, Recurring | Other Long-Term Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at end of year	10
Contingent Consideration liability | Fair Value, Measurements, Recurring | Other Current Liabilities
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value at beginning of year	$ 52
Fair value at end of year		$ 52