Share Repurchase Program and Treasury Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Stock Repurchase Program, Additional Authorized Amount					$ 2,500,000
Share Repurchase Program and Treasury Stock (Textuals) [Abstract]
Remaining Amount to Repurchase under the program	$ 2,600,000				$ 2,600,000
Shares Purchased Under Share Repurchase Program	29,800,000				29,800,000
Treasury Stock, Value, Acquired, Cost Method	$ 212,499	$ 262,500	$ 0	$ 200,000	$ 475,000	$ 200,000
Number of shares repurchased					(390,538)	(268,161)
Average price of share repurchased, per share					$ 1,216.25	$ 745.80
Exercise of stock options and restricted stock units, shares reissued					35,636	114,109