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Leases - Lease Expense and Cash Flow Information (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Leases [Abstract] |  |
Operating lease costs | $ 48.7 | $ 49.5
Finance lease costs: |  |
Amortization of leased assets | 29.0 | 28.2
Interest on lease liabilities | 35.9 | 30.6
Total finance lease costs | 64.9 | 58.8
Variable and short-term lease costs | 16.3 | 13.7
Total lease costs | 129.9 | 122.0
Cash paid for amounts included in the measurement of lease liabilities: |  |
Operating cash outflows from operating leases | 47.2 | 47.9
Operating cash outflows from finance leases | 34.1 | 30.2
Financing cash outflows from finance leases | 19.3 | 18.1
Right-of-use assets obtained in exchange for operating lease obligations | 39.9 | 45.3
Right-of-use assets obtained in exchange for finance lease obligations | $ 108.7 | $ 172.5

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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