Income Taxes (Details) € in Millions, $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 04, 2017 EUR (€)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Income Tax Disclosure [Abstract]
Provision for income taxes		$ 868	$ 984	$ 3,024	$ 1,729
Discrete tax benefits				1,400	831
Cash paid for income taxes, net of refunds		1,803	$ 486	2,604	$ 791	$ 3,526	$ 1,221
Tax contingencies		$ 2,800		$ 2,800		$ 2,800		$ 2,800
Luxembourg Tax Administration [Member] | Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Tax examination, estimate of additional tax expense | €	€ 250