Financial Statement Information Treasury Stock (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Treasury Stock [Abstract]
Stock Repurchase Program, Authorized Amount		$ 1,000,000
Stock Repurchased During Period, Shares	3.9	3.3	10.9
Payments for Repurchase of Common Stock	$ 101,000	$ 88,006	$ 291,813
Stock Repurchase Program Remaining Authorized Repurchases, Amount		$ 560,000