Accounting Policies and Supplemental Disclosures - Use of Estimates (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Jan. 01, 2025	Dec. 31, 2024
Restructuring Cost and Reserve [Line Items]
Increase in depreciation and amortization	$ 14,262	$ 11,684	$ 55,373	$ 49,224
Reduction in net income	$ (17,127)	$ (10,431)	$ (65,944)	$ (37,684)
Reduction in basic earnings per share (in usd per share)	$ (1.62)	$ (1.00)
Reduction in diluted earnings per share (in usd per share)	$ (1.59)	$ (0.98)
Service Life
Restructuring Cost and Reserve [Line Items]
Increase in depreciation and amortization	$ 217
Reduction in net income	$ 162
Reduction in basic earnings per share (in usd per share)	$ 0.02
Reduction in diluted earnings per share (in usd per share)	$ 0.02
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