Debt and Financing Arrangements - Narrative (Details)	Nov. 14, 2025 USD ($)	Sep. 29, 2025	Mar. 25, 2025 USD ($)	Mar. 31, 2026 USD ($) extension_option	Dec. 31, 2025 USD ($)	Dec. 01, 2025 USD ($)	Oct. 01, 2025 USD ($)
Debt Instrument [Line Items]
Short-term debt				$ 536,000,000.0	$ 289,100,000
Commercial Paper				534,000,000.0	287,000,000.0
Other short-term debt				$ 2,000,000.0	$ 2,100,000
Term Loan | Senior Notes
Debt Instrument [Line Items]
Face amount							$ 600,000,000.0
Interest rate, stated percentage (as a percent)				4.66%
Line of credit facility covenants maximum debt to capitalization (as a percent)		65.00%
2025 Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility covenants maximum debt to capitalization (as a percent)			65.00%
Maximum subsidiary borrowings			$ 100,000,000.0
Number of extension options | extension_option				2
Extension term				1 year
2025 Credit Facility | Letter of Credit
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity			50,000,000.0
2025 Credit Facility | Senior Notes | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, accordion feature, higher borrowing capacity option			$ 1,500,000,000
2025 Credit Facility | Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Debt term (in years)			5 years
Line of credit, maximum borrowing capacity			$ 1,000,000,000.0
Senior notes at 4.800% | Senior Notes
Debt Instrument [Line Items]
Face amount	$ 400,000,000
Interest rate, stated percentage (as a percent)	4.80%			4.80%
Proceeds from issuance of long-term debt	$ 392,700,000
Senior notes at 3.35% | Senior Notes
Debt Instrument [Line Items]
Face amount						$ 400,000,000
Interest rate, stated percentage (as a percent)						3.35%