Fair Value (Narrative) (Details) - Recurring Basis - Estimated Fair Value - Fair Value, Inputs, Level 2 [Member] - Foreign Exchange Contracts $ in Millions	Mar. 31, 2021 USD ($)
Other Assets
Summary Of Assets And Liabilities Measured At Fair Value On Recurring Basis [Line Items]
Derivative Asset (less than)	$ 1
Other Liabilities [Member]
Summary Of Assets And Liabilities Measured At Fair Value On Recurring Basis [Line Items]
Derivative Liability	$ 1