Share-Based and Other Deferred Compensation - Equity Grants Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Second Amended Two Thousand Sixteen Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares)		2,492
Shares Vested During Period (in shares)		2,325
Shares Forfeited During Period (in shares)		190
Granted		$ 338,363
Second Amended Two Thousand Sixteen Stock Incentive Plan | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted	$ 283,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award Vesting Period		4 years
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares)			2,978
Weighted Average Grant Date Fair Value (in dollars per share)			$ 123.74
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested			$ 368,561
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share)			$ 83.34
Restricted Stock Units (RSUs) [Member] | Amended Two Thousand Sixteen Stock Incentive Plan [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share)			$ 137.59
Restricted Stock Units (RSUs) [Member] | 2006 and 2016 Stock Incentive Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation Expense			$ 247,386	$ 211,298
Shares Vested During Period (in shares)			2,316	2,287
Shares Forfeited During Period (in shares)			184	184
Restricted Stock Units (RSUs) [Member] | Two Thousand Sixteen Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares)				2,166
Weighted Average Grant Date Fair Value (in dollars per share)				$ 119.86
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested				$ 259,551
Restricted Stock Units (RSUs) [Member] | Two Thousand Sixteen Stock Incentive Plan | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share)				$ 111.03
Restricted Stock Units (RSUs) [Member] | Two Thousand Sixteen Stock Incentive Plan | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share)				$ 154.56
Restricted Stock Units (RSUs) [Member] | Second Amended Two Thousand Sixteen Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares)		2,492
Weighted Average Grant Date Fair Value (in dollars per share)		$ 135.79
Compensation Expense		$ 280,094
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount		$ 364,250
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition		31 months
Restricted Stock Units (RSUs) [Member] | Second Amended Two Thousand Sixteen Stock Incentive Plan | Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares Issued During Period (in shares)	1,550
Award Vesting Period	4 years
Restricted Stock Units (RSUs) [Member] | Second Amended Two Thousand Sixteen Stock Incentive Plan | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share)		$ 107.89
Restricted Stock Units (RSUs) [Member] | Second Amended Two Thousand Sixteen Stock Incentive Plan | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Grant Date Fair Value (in dollars per share)		$ 148.49