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Stock-based Compensation Expense - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average grant date fair value (in dollars per share)	$ 159.32	$ 135.07	$ 123.97
Total intrinsic value	$ 320	$ 336	$ 501
Fair value of shares vested	$ 207	$ 163	$ 151
Purchase price percentage	95.00%
Payroll deductions	10.00%
Shares issued under ESPP (shares)	0.1	0.2	0.1
Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 162
Weighted average amortization period	2 years 2 months 12 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 179
Weighted average amortization period	1 year 10 months 24 days
Minimum \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Term	7 years
Minimum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	3 years
Maximum \| Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	5 years
Term	10 years
Maximum \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	4 years