Stockholders' Equity of the Company - Stock Repurchase Program (Details)	1 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($) increase $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 USD ($) $ / shares shares	Sep. 30, 2018 USD ($)	Aug. 31, 2016 USD ($)
Class of Stock [Line Items]
Share repurchased (in shares)		2,780,667	8,529,279	4,465,857	9,468,617	8,105,881
Average price paid per share (in dollars per share) | $ / shares		$ 71.51	$ 62.39	$ 86.06	$ 99.03	$ 104.61
2016 Repurchase Program
Class of Stock [Line Items]
Stock repurchase program, authorized amount | $			$ 500,000,000.0	$ 500,000,000.0	$ 500,000,000.0	$ 500,000,000.0	$ 500,000,000.0	$ 1,000,000,000.0
Number of increases to share repurchase program | increase		5
Stock repurchase program, authorized amount | $	$ 3,500,000,000	$ 3,500,000,000
Share repurchased (in shares)		33,350,301	30,569,634	22,040,355	17,574,498	8,105,881
Settled In July 2021
Class of Stock [Line Items]
Share repurchased (in shares)	296,424