Description of Business and Accounting Policies - Accounting Pronouncements Recently Adopted (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Mar. 31, 2018	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating leases	$ 25,141	$ 0
Operating Lease, Liability	25,835
Net cash provided by (used in) operating activities	38,514	30,723	$ 18,365
Net Cash Provided by (Used in) Investing Activities	(24,281)	(12,369)	(27,084)
Net cash provided by (used in) financing activities	(10,066)	(7,686)	9,928
Net change in cash, cash equivalents, and restricted cash			1,209
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change to retained earnings and deferred tax assets net of valuation allowances						$ 650
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating leases				$ 21,000
Operating Lease, Liability				(21,000)
Financing Obligations Reclassified to Operating Leases		1,500		$ 1,200
Financing Obligations and Construction Liabilities		9,600
Build-to-suit liabilities derecognized		(1,500)
Financing Obligations Reclassified to Finance Leases		5,400
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Change to retained earnings and deferred tax assets net of valuation allowances					$ 250
Accounting Standards Update 2019-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Capitalized Film Costs	$ 1,000
Previously Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by (used in) operating activities			18,434
Net Cash Provided by (Used in) Investing Activities			(27,819)
Net cash provided by (used in) financing activities			9,860
Net change in cash, cash equivalents, and restricted cash			475
Restatement Adjustment | Accounting Standards Update 2016-18
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by (used in) operating activities			(69)
Net Cash Provided by (Used in) Investing Activities			735
Net cash provided by (used in) financing activities			68
Net change in cash, cash equivalents, and restricted cash			$ 734
Difference between Revenue Guidance in Effect before and after Topic 606 | Service, Subscription
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Sales		3,800
Difference between Revenue Guidance in Effect before and after Topic 606 | Product, Subscription
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Sales		(3,800)
Difference between Revenue Guidance in Effect before and after Topic 606 | Service, Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Net Sales		$ 3,000