Restructuring Charges (Components of Restructuring Expense) (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2025	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Restructuring and Related Cost [Line Items]
Severance	$ 49,968				$ 75,356	$ 43,209
Facilities and other	8,424				1,559	9,203
Total	58,392			$ 58,392	76,915	52,412
Continuing Operations
Restructuring and Related Cost [Line Items]
Total				58,392	76,915
2025 Plan
Restructuring and Related Cost [Line Items]
Severance	36,158
Facilities and other	7,028
Total	43,186			36,000
2025 Plan | Continuing Operations
Restructuring and Related Cost [Line Items]
Total				43,186	0
2024 Plan
Restructuring and Related Cost [Line Items]
Total		$ 89,000
2024 Plan | Continuing Operations
Restructuring and Related Cost [Line Items]
Severance	13,810				65,958
Facilities and other	1,396				336
Total	$ 15,206			15,206	66,294
2023 Plan
Restructuring and Related Cost [Line Items]
Total			$ 69,000
2023 Plan | Continuing Operations
Restructuring and Related Cost [Line Items]
Severance					9,398	40,152
Facilities and other					1,223	8,661
Total				$ 0	$ 10,621	48,813
Prior Plan | Continuing Operations
Restructuring and Related Cost [Line Items]
Severance						3,057
Facilities and other						542
Total						$ 3,599