Financial Statement Information Treasury Stock (Details) - USD ($) $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Treasury Stock [Abstract]
Stock Repurchase Program, Authorized Amount			$ 1,000,000
Stock Repurchased During Period, Shares	3.3	2.6
Payments for Repurchase of Common Stock	$ 88,006	$ 70,462
Stock Repurchase Program Remaining Authorized Repurchases, Amount	$ 560,000