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Debt and Credit Arrangements (Notes)
 6 Months Ended
Jun. 30, 2022
Debt Disclosure [Abstract]  
Debt and Credit Arrangements Debt and Credit Arrangements
Long-Term Debt
A summary of the carrying amounts of our long-term debt is listed below.
 Effective
Interest Rate		June 30,
2022		December 31,
2021
4.200% Senior Notes due 2024 (less unamortized discount and issuance costs of $0.1 and $0.4, respectively)4.240%$249.5 $249.4 
4.650% Senior Notes due 2028 (less unamortized discount and issuance costs of $1.1 and $2.8, respectively)4.780%496.1 495.8 
4.750% Senior Notes due 2030 (less unamortized discount and issuance costs of $3.0 and $4.8, respectively)4.920%642.2 641.7 
2.400% Senior Notes due 2031 (less unamortized discount and issuance costs of $0.8 and $4.0, respectively)2.512%495.2 495.0 
3.375% Senior Notes due 2041 (less unamortized discount and issuance costs of $1.0 and $5.4, respectively)3.448%493.6 493.4 
5.400% Senior Notes due 2048 (less unamortized discount and issuance costs of $2.6 and $4.9, respectively)5.480%492.5 492.3 
Other notes payable and capitalized leases37.6 41.7 
Total long-term debt2,906.7 2,909.3 
Less: current portion0.6 0.7 
Long-term debt, excluding current portion$2,906.1 $2,908.6 
As of June 30, 2022 and December 31, 2021, the estimated fair value of the Company's long-term debt was $2,696.0 and $3,337.4, respectively. Refer to Note 12 for details.
Credit Agreement
We maintain a committed corporate credit facility, originally dated as of July 18, 2008, which has been amended and restated from time to time (the "Credit Agreement"). We use our Credit Agreement to increase our financial flexibility, to provide letters of credit primarily to support obligations of our subsidiaries and to support our commercial paper program. On November 1, 2021, we amended and restated the Credit Agreement. As amended, among other things, the maturity date of the Credit Agreement was extended to November 1, 2026 and the cost structure of the Credit Agreement was changed. The Credit Agreement continues to include a required leverage ratio of not more than 3.50 to 1.00, among other customary covenants, including limitations on our liens and the liens of our consolidated subsidiaries and limitations on the incurrence of subsidiary debt. At the election of the Company, the leverage ratio may be changed to not more than 4.00 to 1.00 for four consecutive quarters, beginning with the fiscal quarter in which there is an occurrence of one or more acquisitions with an aggregate purchase price of at least $200.0.
The Credit Agreement is a revolving facility, under which amounts borrowed by us or any of our subsidiaries designated under the Credit Agreement may be repaid and reborrowed, subject to an aggregate lending limit of $1,500.0, or the equivalent in other currencies. The Company has the ability to increase the commitments under the Credit Agreement from time to time by an additional amount of up to $250.0, provided the Company receives commitments for such increases and satisfies certain other conditions. The aggregate available amount of letters of credit outstanding may decrease or increase, subject to a sublimit of $50.0, or the equivalent in other currencies. Our obligations under the Credit Agreement are unsecured. As of June 30, 2022, there were no borrowings under the Credit Agreement; however, we had $10.6 of letters of credit under the Credit Agreement, which reduced our total availability to $1,489.4. We were in compliance with all of our covenants in the Credit Agreement as of June 30, 2022.
Uncommitted Lines of Credit
We also have uncommitted lines of credit with various banks that permit borrowings at variable interest rates and that are primarily used to fund working capital needs. We have guaranteed the repayment of some of these borrowings made by certain subsidiaries. If we lose access to these credit lines, we would have to provide funding directly to some of our operations. As of June 30, 2022, the Company had uncommitted lines of credit in an aggregate amount of $955.1, under which we had outstanding borrowings of $45.7 classified as short-term borrowings on our Consolidated Balance Sheet. The average amount outstanding during the second quarter of 2022 was $62.9 with a weighted-average interest rate of approximately 4.7%.
Commercial Paper
The Company is authorized to issue unsecured commercial paper up to a maximum aggregate amount outstanding at any time of $1,500.0. Borrowings under the program are supported by the Credit Agreement described above. Proceeds of the commercial paper are used for working capital and general corporate purposes, including the repayment of maturing indebtedness and other short-term liquidity needs. The maturities of the commercial paper vary but may not exceed 397 days from the date of issue. During the second quarter of 2022, there was no commercial paper activity and, as of June 30, 2022, there was no commercial paper outstanding.