Share Repurchase Program and Treasury Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Stock Repurchase Program, Additional Authorized Amount						$ 2,500,000
Share Repurchase Program and Treasury Stock (Textuals) [Abstract]
Remaining Amount to Repurchase under the program	$ 900,000					$ 900,000
Shares Purchased Under Share Repurchase Program	29,100,000					29,100,000
Treasury Stock, Value, Acquired, Cost Method	$ 199,999	$ 200,000	$ 186,250	$ 186,250	$ 186,250	$ 400,000	$ 558,700
Number of shares repurchased						(475,530)	(794,603)
Average price of share repurchased, per share						$ 841.14	$ 703.16
Exercise of stock options and restricted stock units, shares reissued						144,776	226,841