Financial Statement Information Treasury Stock (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Treasury Stock [Abstract]
Stock Repurchase Program, Authorized Amount		$ 1,000,000
Stock Repurchased During Period, Shares	4.4	3.3	7.0
Payments for Repurchase of Common Stock	$ 120,000	$ 88,006	$ 190,762
Stock Repurchase Program Remaining Authorized Repurchases, Amount		$ 560,000