Stock-Based Compensation - Narrative (Details) shares in Millions	3 Months Ended			9 Months Ended			12 Months Ended
	Mar. 31, 2024 shares	Mar. 31, 2023 shares	Mar. 31, 2022 shares	Dec. 31, 2023 $ / shares shares	Dec. 31, 2022 $ / shares shares	Dec. 31, 2021 shares	Dec. 31, 2024 $ / shares shares	Dec. 31, 2023 performance_period $ / shares shares	Dec. 31, 2022 $ / shares shares
Time Based and Performance Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period							3 years
Granted (in shares)	2.7	2.7	1.6
Number of additional shares authorized (in shares)				0.3	0.5	0.1
Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							1.9	0.5	0.7
Number of performance periods | performance_period								3
Share-based compensation arrangement by share-based payment award, award vesting period								1 year
Weighted average exercise price per share, exercisable (in dollars per share) | $ / shares					$ 25.02				$ 25.02
2024 Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							1.6
Strategic cost efficiency, percent							50.00%
2024 Performance-based RSUs | Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Strategic cost efficiency, percent							25.00%
Strategic cash generation, percent							75.00%
2023 Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)								0.3
Strategic cost efficiency, percent							50.00%
Adjusted free cash flow, percent							50.00%
2022 Performance-based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Margin performance based, percent							50.00%
Margin growth based, percent							50.00%
Time-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period							1 year 9 months 18 days
Minimum | Time Based and Performance Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period				3 years	3 years	3 years
Minimum | Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price per share, exercisable (in dollars per share) | $ / shares				$ 8.25			$ 10.01	$ 8.25
Maximum | Performance-Based RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average exercise price per share, exercisable (in dollars per share) | $ / shares				$ 14.64			$ 10.35	$ 14.64