Accounting Policies and Supplemental Disclosures - Use of Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Jan. 01, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Increase in depreciation and amortization	$ 16,796	$ 13,442	$ 46,285	$ 37,164	$ 61,916	$ 50,984
Reduction in net income	$ (21,187)	$ (15,328)	$ (56,478)	$ (39,244)	$ (76,482)	$ (49,868)
Reduction in basic earnings per share (in usd per share)	$ (1.98)	$ (1.46)	$ (5.31)	$ (3.76)
Reduction in diluted earnings per share (in usd per share)	$ (1.95)	$ (1.43)	$ (5.22)	$ (3.67)
Estimated severance costs	$ 1,800		$ 2,000
Settled Litigation | Federal Trade Commission
Restructuring Cost and Reserve [Line Items]
Settlement expense	2,500
Service Life
Restructuring Cost and Reserve [Line Items]
Increase in depreciation and amortization	392		889
Reduction in net income	$ 298		$ 677
Reduction in basic earnings per share (in usd per share)	$ 0.03		$ 0.06
Reduction in diluted earnings per share (in usd per share)	$ 0.03		$ 0.06
Servers
Restructuring Cost and Reserve [Line Items]
Estimated useful lives of assets								6 years
Servers | Service Life
Restructuring Cost and Reserve [Line Items]
Estimated useful lives of assets							5 years
Networking equipment
Restructuring Cost and Reserve [Line Items]
Estimated useful lives of assets								6 years
Networking equipment | Service Life
Restructuring Cost and Reserve [Line Items]
Estimated useful lives of assets							5 years