Equity (Common Stock Repurchase Authorization) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jul. 31, 2019	Nov. 01, 2018
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Authorized Amount		$ 2,000	$ 2,000
July2019Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 485
November2018Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 0