Leases (Lease Balances) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Jun. 01, 2022
Leases [Abstract]
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization		Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets, Noncurrent		Other Assets, Noncurrent
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Current portion of debt and finance lease obligations (notes 9 and 10), Long-term debt and finance lease obligations		Current portion of debt and finance lease obligations (notes 9 and 10), Long-term debt and finance lease obligations
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Accrued Liabilities, Current		Other Accrued Liabilities, Current
ROU assets:
Finance leases	$ 57.7		$ 377.6
Operating leases	1,658.5		1,724.4
Total ROU assets	1,716.2		2,102.0
Lease liabilities:
Finance lease	56.1		436.1
Operating leases	1,703.9		1,791.1	$ 615.1
Total lease liabilities	$ 1,760.0		$ 2,227.2
Weighted average remaining lease term for finance leases	10 years 9 months 18 days
Weighted average discount rate, for finance leases	4.90%
ROU assets associated with finance leases	$ 20.8	$ 25.8
Weighted average remaining lease term for operating leases	12 years 7 months 6 days
Weighted average discount rate, for operating leases	5.80%
Addition to ROU assets associated with operating leases	$ 38.0	$ 670.0